diff --git a/règles/rémunération-travail/entités/ok/contrat-salarié.yaml b/règles/rémunération-travail/entités/ok/contrat-salarié.yaml
index ebeab32ee..be64664fe 100644
--- a/règles/rémunération-travail/entités/ok/contrat-salarié.yaml
+++ b/règles/rémunération-travail/entités/ok/contrat-salarié.yaml
@@ -57,7 +57,9 @@
     SMIC mi-temps: 740
 
   inversions possibles:
-    - contrat salarié . salaire net
+    - salaire net
+    - salaire super brut
+    - coût du travail
 
   références:
     Le salaire. Fixation et paiement: http://travail-emploi.gouv.fr/droit-du-travail/remuneration-et-participation-financiere/remuneration/article/le-salaire-fixation-et-paiement
diff --git a/source/components/Home.js b/source/components/Home.js
index 8013af21b..9fe20fe91 100644
--- a/source/components/Home.js
+++ b/source/components/Home.js
@@ -1,17 +1,12 @@
 import React, { Component } from 'react'
 import './Home.css'
-import { Link } from 'react-router-dom'
 import ReactPiwik from 'Components/Tracker' //TODO réintégrer Piwik
-import { rules } from 'Engine/rules'
-import { propEq, reject } from 'ramda'
+import TargetSelection from './TargetSelection'
+
+
+export default class Home extends Component {
 
-export default class HomeEmbauche extends Component {
-	state = {
-		input: 'salaire de base',
-		targets: ['salaire net']
-	}
 	render() {
-		let { targets, input } = this.state
 
 		return (
 			<div id="home">
@@ -23,55 +18,9 @@ export default class HomeEmbauche extends Component {
 					/>
 					<h1>Simulateurs d'embauche</h1>
 				</div>
-				<section id="selection">
-					<h2>Que voulez-vous faire ?</h2>
-					<p>Choisissez ce que vous allez saisir</p>
-					{this.renderInputList()}
-					<div id="conversionSymbol">↓</div>
-					<p>Choisissez ce que nous allons calculer</p>
-					{this.renderOutputList()}
-					<Link to={'/simu/' + targets.join('+') + '/' + input}>
-						<button>C'est parti !</button>
-					</Link>
-				</section>
+				<TargetSelection />
 			</div>
 		)
 	}
-	renderInputList() {
-		let salaires = rules.filter(propEq('type', 'salaire'))
-		return (
-			<select
-				defaultValue="salaire de base"
-				onMouseDown={e => this.setState({ input: e.target.value })}
-			>
-				{salaires.map(s => (
-					<option key={s.name} value={s.name}>
-						{s.title || s.name}
-					</option>
-				))}
-			</select>
-		)
-	}
-	renderOutputList() {
-		let salaires = rules.filter(propEq('type', 'salaire')),
-			{ targets, input } = this.state
-		return (
-			<select
-				multiple
-				value={targets}
-				onChange={e =>
-					this.setState({
-						targets: targets.find(t => t === e.target.value)
-							? reject(t => t === e.target.value, targets)
-							: [...targets, e.target.value]
-					})}
-			>
-				{salaires.map(s => (
-					<option key={s.name} value={s.name} disabled={s.name === input}>
-						{s.title || s.name}
-					</option>
-				))}
-			</select>
-		)
-	}
+
 }
diff --git a/source/components/TargetSelection.js b/source/components/TargetSelection.js
new file mode 100644
index 000000000..a923ddc68
--- /dev/null
+++ b/source/components/TargetSelection.js
@@ -0,0 +1,50 @@
+import React, { Component } from 'react'
+import { rules } from 'Engine/rules'
+import { propEq, reject } from 'ramda'
+import { Link } from 'react-router-dom'
+
+export default class TargetSelection extends Component {
+	state = {
+		targets: ['salaire net', 'coût du travail']
+	}
+	render() {
+		let { targets } = this.state
+
+		return (
+			<section id="selection">
+				<h2>Que voulez-vous faire ?</h2>
+				<p>Choisissez un ou plusieurs objectifs de calcul</p>
+				{this.renderOutputList()}
+				{targets.length !==0 && (
+					<Link to={'/simu/' + targets.join('+')}>
+						<button>Valider</button>
+					</Link>
+				)}
+			</section>
+		)
+	}
+
+	renderOutputList() {
+		let salaires = rules.filter(propEq('type', 'salaire')),
+			{ targets } = this.state
+		return (
+			<select
+				multiple
+				value={targets}
+				onMouseDown={e =>
+					this.setState({
+						targets: targets.find(t => t === e.target.value)
+							? reject(t => t === e.target.value, targets)
+							: [...targets, e.target.value]
+					})
+				}
+			>
+				{salaires.map(s => (
+					<option key={s.name} value={s.name}>
+						{s.title || s.name}
+					</option>
+				))}
+			</select>
+		)
+	}
+}
diff --git a/source/containers/Layout.js b/source/containers/Layout.js
index ff2d8911b..c57c36e41 100644
--- a/source/containers/Layout.js
+++ b/source/containers/Layout.js
@@ -58,7 +58,7 @@ export default class Layout extends Component {
 							<Route path="/contact" component={Contact} />
 							<Route path="/regle/:name" component={Rule} />
 							<Route path="/regles" component={RulesList} />
-							<Route path="/simu/:targets/:firstInput?" component={Simulateur} />
+							<Route path="/simu/:targets" component={Simulateur} />
 							<Redirect from="/simu/:name/intro" to="/simu/:name" />
 							<Route component={Route404} />
 						</Switch>
diff --git a/source/engine/traverse.js b/source/engine/traverse.js
index 2849d47e9..341a9cdf3 100644
--- a/source/engine/traverse.js
+++ b/source/engine/traverse.js
@@ -415,7 +415,9 @@ export let findInversion = (situationGate, rules, rule) => {
 	Ex. s'il nous est demandé de calculer le salaire de base, est-ce qu'un candidat à l'inversion, comme
 	le salaire net, a été renseigné ?
 	*/
-	let fixedObjective = inversions.find(name => situationGate(name) != undefined) //TODO ça va foirer avec des espaces de nom
+	let fixedObjective = inversions
+		.map(i => disambiguateRuleReference(rules, rule, i))
+		.find(name => situationGate(name) != undefined)
 	if (fixedObjective == null) return null
 	//par exemple, fixedObjective = 'salaire net', et v('salaire net') == 2000
 	return {
@@ -469,8 +471,9 @@ let doInversion = (situationGate, parsedRules, r) => {
 
 export let treatRuleRoot = (rules, rule) => {
 	let evaluate = (situationGate, parsedRules, r) => {
-		let inversion = situationGate(r.dottedName) == undefined // avoid the inversion loop !
-			&& doInversion(situationGate, parsedRules, r)
+		let inversion =
+			situationGate(r.dottedName) == undefined && // avoid the inversion loop !
+			doInversion(situationGate, parsedRules, r)
 		if (inversion) return { ...r, ...inversion }
 
 		let evolveRule = R.curry(evaluateNode)(situationGate, parsedRules),