Answer:
Option (D) is correct.
Explanation:
Expected Revenue = 30 Customers × 4 hours each × $31 per hour.
= $3,720
Actual Revenue = 40 Customers × 3.5 hours each × $31 per hour.
= $4,340
Increased Revenue = $4,340 - $3,720
= $620
Therefore, Cali's revenues for the month were 620 more than expected.