The Sterling Tire Company's Income statement for 20XX is as follows:
| Item | Amount |
|-----------------------------|-------------------|
| Sales (60,000 tires at $75 each) | - |
| Less: Variable costs | - |
What is the missing amount for Sales (60,000 tires at $75 each)?
a) $4,500,000
b) $5,000,000
c) $4,750,000
d) $4,250,000