I have started filling in these problems but can't seem to figure out the rest. please help.

Crimson Tide Music Academy offers lessons in playing a wide range of musical instruments. The unadjusted trial balance as of December 31, 2018, appears below. December 31 is the company's fiscal year-end Accounts Debits Credits Cash 8,700 Accounts Receivable 7900 Supplies 1,200 Prepaid Rent 5,280 Equipment 66,000 8,800 Accumulated Depreciation 6.100 Accounts Payable Salaries Payable Interest Payable Utilities Payable Notes Payable 2,000 29,000 Common Stock Retained Earnings 13.400 Service Revenue 44,280 Salaries Expense 22,900 Interest Expense Rent Expense Supplies Expense Utilities Expense 600 Depreciation Expense Totals $113,580 $113,580 Information necessary to prepare the year-end adjusting entries appears below. a. Depreciation of equipment for the year is $4,400. b. Accrued salaries at year-end should be $1,300. c. Crimson Tide borrows $12,000 on September 1, 2018. The principal is due to be repaid in four years. Interest is payable each August 31 at an annual rate of 12%. d. Unused supplies at year-end total $540. Crimson Tide debits Supplies at the time supplies are purchased. e. Crimson Tide opens a second studio by paying for one year of rent in advance on April 1, 2018, for $5,280 ($440 per month) debiting Prepaid Rent. f Unpaid utilities for December total $200