diff --git a/index.html b/index.html
index 17d3278..8f4e8c0 100644
--- a/index.html
+++ b/index.html
@@ -21,15 +21,22 @@ <h2>Cash multiplier: {{(player.multiplier).toFixed(4)}}</h2>
 		  <button ng-click="click()">Generate cash ${{player.cashPerClick}}</button>
 		  <p>Cash: $<span ng-bind-html="currencyValue()"/></p>    
 		  <h3>Multiplier upgrades</h3>
-		  <button ng-click="buyMultiplierUpgrade(0)" ng-disabled="player.currency.comparedTo(player.multiplierUpgradePrice[0]) < 0">+{{multiplierUpgradePower[0]}} (cost ${{player.multiplierUpgradePrice[0]}})</button>
-		  <button ng-click="buyMultiplierUpgrade(1)" ng-disabled="player.currency.comparedTo(player.multiplierUpgradePrice[1]) < 0">+{{multiplierUpgradePower[1]}} (cost ${{player.multiplierUpgradePrice[1]}})</button>
-		  <button ng-click="buyMultiplierUpgrade(2)" ng-disabled="player.currency.comparedTo(player.multiplierUpgradePrice[2]) < 0">+{{multiplierUpgradePower[2]}} (cost ${{player.multiplierUpgradePrice[2]}})</button>
-		  <button ng-click="buyMultiplierUpgrade(3)" ng-disabled="player.currency.comparedTo(player.multiplierUpgradePrice[3]) < 0">+{{multiplierUpgradePower[3]}} (cost ${{player.multiplierUpgradePrice[3]}})</button>
-		  <button ng-click="buyMultiplierUpgrade(4)" ng-disabled="player.currency.comparedTo(player.multiplierUpgradePrice[4]) < 0">+{{multiplierUpgradePower[4]}} (cost ${{player.multiplierUpgradePrice[4]}})</button>
+		  <button ng-click="buyMultiplierUpgrade(0)" ng-disabled="player.currency.comparedTo(player.multiplierUpgradePrice[0]) < 0">+{{multiplierUpgradePower[0]}} (cost ${{player.multiplierUpgradePrice[0].toString()}})</button>
+		  <br>
+		  <button ng-click="buyMultiplierUpgrade(1)" ng-disabled="player.currency.comparedTo(player.multiplierUpgradePrice[1]) < 0">+{{multiplierUpgradePower[1]}} (cost ${{player.multiplierUpgradePrice[1].toString()}})</button>
+		  <br>
+		  <button ng-click="buyMultiplierUpgrade(2)" ng-disabled="player.currency.comparedTo(player.multiplierUpgradePrice[2]) < 0">+{{multiplierUpgradePower[2]}} (cost ${{player.multiplierUpgradePrice[2].toString()}})</button>
+		  <br>
+		  <button ng-click="buyMultiplierUpgrade(3)" ng-disabled="player.currency.comparedTo(player.multiplierUpgradePrice[3]) < 0">+{{multiplierUpgradePower[3]}} (cost ${{player.multiplierUpgradePrice[3].toString()}})</button>
+		  <br>
+		  <button ng-click="buyMultiplierUpgrade(4)" ng-disabled="player.currency.comparedTo(player.multiplierUpgradePrice[4]) < 0">+{{multiplierUpgradePower[4]}} (cost ${{player.multiplierUpgradePrice[4].toString()}})</button>
 		  <h3>Click power upgrades</h3>
 		  <button ng-click="buyClickUpgrade(0)" ng-disabled="player.multiplier.comparedTo(player.clickUpgradePrice[0]) < 0">+{{clickUpgradePower[0]}} (cost {{player.clickUpgradePrice[0]}} multiplier)</button>
+		  <br>
 		  <button ng-click="buyClickUpgrade(1)" ng-disabled="player.multiplier.comparedTo(player.clickUpgradePrice[1]) < 0">+{{clickUpgradePower[1]}} (cost {{player.clickUpgradePrice[1]}} multiplier)</button>
+		  <br>
 		  <button ng-click="buyClickUpgrade(2)" ng-disabled="player.multiplier.comparedTo(player.clickUpgradePrice[2]) < 0">+{{clickUpgradePower[2]}} (cost {{player.clickUpgradePrice[2]}} multiplier)</button>
+		  <br>
 		  <button ng-click="buyClickUpgrade(3)" ng-disabled="player.multiplier.comparedTo(player.clickUpgradePrice[3]) < 0">+{{clickUpgradePower[3]}} (cost {{player.clickUpgradePrice[3]}} multiplier)</button>
 	  <hr>
    </div>  
diff --git a/js/exponential.js b/js/exponential.js
index f0253a3..17e5385 100644
--- a/js/exponential.js
+++ b/js/exponential.js
@@ -10,11 +10,11 @@ angular.module('incremental',[])
 									0,
 									0,
 									0],
-			multiplierUpgradePrice: [10,
-									100,
-									10000,
-									100000000,
-									10000000000000000],
+			multiplierUpgradePrice: [new Decimal(10),
+									new Decimal(100),
+									new Decimal(10000),
+									new Decimal(100000000),
+									new Decimal(10000000000000000)],
 			clickUpgradeLevel: [0,
 								0,
 								0,
@@ -28,21 +28,16 @@ angular.module('incremental',[])
 			};
 		
 		var lastUpdate = 0;
-        var multiplierUpgradeBasePrice = [10,
-										100,
-										10000,
-										100000000,
-										10000000000000000];
+        var multiplierUpgradeBasePrice = [new Decimal(10),
+										new Decimal(100),
+										new Decimal(10000),
+										new Decimal(100000000),
+										new Decimal(10000000000000000)];
         $scope.multiplierUpgradePower = [0.0001,
 									0.001,
 									0.01,
 									0.1,
 									1];
-        var clickUpgradeBasePrice = [10,
-									100,
-									10000,
-									100000000,
-									10000000000000000];
         $scope.clickUpgradePower = [10,
 								1000,
 								100000,
@@ -61,9 +56,10 @@ angular.module('incremental',[])
                 $scope.player.currency = $scope.player.currency.minus($scope.player.multiplierUpgradePrice[number]);
                 $scope.player.multiplier = $scope.player.multiplier.plus($scope.multiplierUpgradePower[number]);
                 $scope.player.multiplierUpgradeLevel[number]++;
-				$scope.player.multiplierUpgradePrice[number] = (multiplierUpgradeBasePrice[number] * 
-					Math.pow(2,Math.pow(1+0.2*(number+1),$scope.player.multiplierUpgradeLevel[number])))
-					.toFixed();
+				// The cost function is of the form 2^1.x^(upgradeLevel), where 1.x depends on the upgrade tier
+				var exponent = Decimal.pow(1+0.2*(number+1),$scope.player.multiplierUpgradeLevel[number]);
+				$scope.player.multiplierUpgradePrice[number] = multiplierUpgradeBasePrice[number].
+					times(Decimal.pow(2,exponent));
             }
         };