diff --git a/src/js/economyJS.tw b/src/js/economyJS.tw
index 1d382f48a16e588005da22c6ec20ed79b1a7cb39..ed30e3277559433766b341bd9c9ee2c15d65f6a7 100644
--- a/src/js/economyJS.tw
+++ b/src/js/economyJS.tw
@@ -360,7 +360,7 @@ window.getSlaveCost = function(s) {
 			cost += 100;
 			break;
 		case 'food':
-			costs += (foodCost * 4);
+			cost += (foodCost * 4);
 			break;
 		case 'curative': case 'aphrodisiac': case 'tightener':
 			cost += (100 + (drugsCost * 2));
@@ -372,7 +372,7 @@ window.getSlaveCost = function(s) {
 			cost += 50;
 			break;
 		case 'food':
-			costs += (foodCost * 2);
+			cost += (foodCost * 2);
 			break;
 		case 'curative': case 'aphrodisiac': case 'tightener':
 			cost += (50 + (drugsCost * 2));
@@ -384,7 +384,7 @@ window.getSlaveCost = function(s) {
 			cost += 25;
 			break;
 		case 'food':
-			costs += (foodCost);
+			cost += (foodCost);
 			break;
 		case 'curative': case 'aphrodisiac': case 'tightener':
 			cost += (25 + (drugsCost * 2));