7. Calvin earns $10.00 per hour for up to 40 hours of work
in a given week. For each hour Calvin works over 40
hours in a week, he earns 1.25 times his regular hourly
rate. How much does Calvin earn for a week in which
he works 48 hours?
A. $600.00
B. $520.00
C. $512.50
D. $500.00
E. $481.25