*This is a real estate math question. Please show steps. Thank you

For this question prorate using a 30-day month and a 360-day year, prorate the taxes as of the close of escrow, and split the escrow fee 50-50 between the parties.

Closing is July 31.

Use these relevant facts:

Purchase price: $250,000 cash

Earnest money: $10,000

Commission rate: 5%, split 50-50

Revenue stamps: $250

Real estate taxes: $3,500 [paid in full for current tax year of Jan. 1 through Dec. 31)

Water bill: $450 (six months paid to Sept 15)

Title insurance: $953.51

Recording fee: $20

Escrow fee: $868

Loan balance: $94,500 ( existing loan, including credit for the reserve account)

Select one:

a. $7,500

b. $12,500

c. $25,000

d. $16,500