diff --git a/src/js/economyJS.js b/src/js/economyJS.js
index 819da686affa66dd8f68379cf623e2fd0b57a000..f3d5af97c07aaed921da249d4d052f129b7dab06 100644
--- a/src/js/economyJS.js
+++ b/src/js/economyJS.js
@@ -38,8 +38,7 @@ window.PersonalAttention = Object.freeze({
 	HACKING: 'hacking'
 });
 
-window.predictCost = function(array) {
-	const array2 = array;
+window.predictCost = function() {
 	let totalCosts = (
 		getBrothelCosts() +
 	getBrothelAdsCosts() +
@@ -66,7 +65,7 @@ window.predictCost = function(array) {
 	getProstheticsCosts() +
 	getPCTrainingCosts() +
 	getPCCosts() +
-	predictTotalSlaveCosts(array2)
+	predictTotalSlaveCosts()
 	);
 
 	// these two apply a multiplicative effect to all costs so far.
@@ -89,8 +88,7 @@ window.predictCost = function(array) {
 	return totalCosts;
 };
 
-window.getCost = function(array) {
-	const array2 = array;
+window.getCost = function() {
 	const oldCash = State.variables.cash;
 	let costSoFar = 0;
 	cashX(forceNeg(getBrothelCosts()), "brothel");
@@ -118,7 +116,7 @@ window.getCost = function(array) {
 	cashX(forceNeg(getProstheticsCosts()), "lab");
 	cashX(forceNeg(getPCTrainingCosts()), "PCtraining");
 	cashX(forceNeg(getPCCosts()), "PCmedical");
-	getTotalSlaveCosts(array2);
+	getTotalSlaveCosts();
 
 
 	// these two apply a multiplicative effect to all costs so far.
@@ -136,20 +134,20 @@ window.getCost = function(array) {
 };
 
 // slave expenses
-window.predictTotalSlaveCosts = function(array3) {
+window.predictTotalSlaveCosts = function() {
 	let loopCosts = 0;
 	// slave expenses
-	for (const slave of array3) {
+	for (const slave of State.variables.slaves) {
 		loopCosts += getSlaveCost(slave);
 		loopCosts += getSlaveMinorCosts(slave);
 	}
 	return loopCosts;
 };
 
-window.getTotalSlaveCosts = function(array3) {
+window.getTotalSlaveCosts = function() {
 	let slaveCost = 0;
 	let slaveCostMinor = 0;
-	for (const slave of array3) {
+	for (const slave of State.variables.slaves) {
 		slaveCost = getSlaveCost(slave);
 		cashX(forceNeg(slaveCost), "slaveUpkeep", slave);
 		slaveCostMinor = getSlaveMinorCosts(slave);
diff --git a/src/uncategorized/main.tw b/src/uncategorized/main.tw
index fda0d00c63ff99db3d458208eabc122a0bb8f8b4..4270c5ecbb5d924004093525201610e053fffb10 100644
--- a/src/uncategorized/main.tw
+++ b/src/uncategorized/main.tw
@@ -67,7 +67,7 @@
 <<if (def _BG && $dojo > 1)>><<set $slavesVisible++>><</if>>
 
 <<set $nextButton = "END WEEK", $nextLink = "End Week", $showEncyclopedia = 1, $encyclopedia = "How to Play">>
-<<set $costs = Math.trunc(predictCost($slaves))>>
+<<set $costs = Math.trunc(predictCost())>>
 
 <<if ($PC.customTitle == "")>>
 	<<set $PC.customTitle = undefined, $PC.customTitleLisp = undefined>>
diff --git a/src/uncategorized/persBusiness.tw b/src/uncategorized/persBusiness.tw
index 000c82f214c65e1117403177fb516afbf5a3ee19..2159a18440b02b80ab2ef36005739395a73502d8 100644
--- a/src/uncategorized/persBusiness.tw
+++ b/src/uncategorized/persBusiness.tw
@@ -808,7 +808,7 @@ Routine upkeep of your demesne costs @@.yellow;<<print cashFormat($costs)>>.@@
 		<</if>>
 	<</if>>
 <</if>>
-<<set $costs = Math.trunc(Math.abs(getCost($slaves)) * 100)/100>> /*overwrite the prediction and actually pay the bill. GetCost should return a negative. Round to two decimal places.*/
+<<set $costs = Math.trunc(Math.abs(getCost()) * 100)/100>> /*overwrite the prediction and actually pay the bill. GetCost should return a negative. Round to two decimal places.*/
 <<if isNaN($costs)>>
 	<br>@@.red;Error, costs is NaN@@
 <</if>>