Hi,
Please be more specific. What exactly are you stuck on, and what have you tried? And please post the complete code (inside code tags); I can't tell whether you've defined the 'quantity1' and 'price1' variables before trying to use them.
One definite problem though is you're not doing anything with the return value from Integer.parseInt(quantity1). You'll need new int variables for both quantity and price, assigned to the return value from Integer.parseInt(). Then you'll have the two ints needed to multiply.