Refer to this income statement to answer the question below.

Forks Gym
Income Statement
From the Month Ended January 31, xxxx

Revenue:
Membership Fees Revenue, 15,000.00
Rental Revenue, 8,000.00
Instruction Revenue, 5,000.00
Total Revenue = 28,000.00

Expenses:
Advertising Expense, 2,000.00
Rent Expense, 1,000.00
Salaries Expense, 3,000.00
Utilities Expense, 1,000.00
Total Expenses = 7,000.00

Net Income - 21,000.00

What is the total revenue for membership fees?

A. $15,000

B. $8,000

C. $5,000

D. $28,000
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