Question 235795
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).