You can
put this solution on YOUR website!60 - 3 = 57
1188/57 = $20.84
If you're looking for the original purchase price, you'd just divide by 2.
Each cassette was sold for $20.84 cents.
THE PROVE:
57 cassettes at $20.84 each = $1187.88, which can be rounded to the nearest unit to become $1188 (the profit made by the store).