Calling a method of a seperate class into another class

Question

This small method is part of a very large program with many separate classes. The method below is meant to call in a portion of my Purchase class which keeps track of how much inventory is bought. However, although I have instantiated as follows above

 Purchase currentPurchase;

I continue to receive the errors "identifier is expected", and "cannot find symbol".

Method:

public double processPurchase(currentPurchase){

lemonsBought = currentPurchase.getNumLemonsBought();
iceBought = currentPurchase.getNumLemonsBought();
    cupsBought = currentPurchase.getNumCupsBought();
    sugarBought = currentPurchase.getNumSugarBought();

     lemonInventory += lemonsBought;
     iceInventory += iceBought;
     cupInventory += cupsBought;
     sugarInventory += sugarBought;
     money -= (.5 * lemonsBought) + (2 * iceBought) + (2 * cupsBought) + (0.25 * sugarBought);

    return currentPurchase;
 } 

Money is a separate pre-instantiated variable

Answer 1

You need to add the identifier to your function or else the java compiler will not know what it should be receiving.

public double processPurchase(Purchase currentPurchase){

Answer 2

I think you are returning a wrong variable currentPurchase which u have passed as an argument and I you have't even manipulated it .R u sure u need this variable or money which is a double variable as well.