Still can't figure out what is wrong here. TYIA.

The only one I'm having difficulty with is number 18 (or R)

On January 1, Pulse Recording Studio (PRS) had the following account balances. The following transactions occurred during January. a. Received $2,420 cash on 1/1 from customers on account for recording services completed in December. b. Wrote checks on 1/2 totaling $4,370 for amounts owed on account at the end of December. c. Purchased and received supplies on account on 1/3, at a total cost of $200. d. Completed $3,900 of recording sessions on 1/4 that customers had paid for in advance in December. e. Received $4,750 cash on 1/5 from customers for recording sessions started and completed in January. f. Wrote a check on 1/6 for $4,000 for an amount owed on account. g. Converted $1,010 of cash equivalents into cash on 1/7. h. On 1/15, completed EFTs for $1,400 for employees' salaries and wages for the first half of January. i. Received $2,940 cash on 1/31 from customers for recording sessions to start in February. 3. Prepare adjusting journal entries on 1/31 in 'General Journal' Tab. (these are shown as items 15 to 21 ). o. Depreciation for the month is $240. p. Salaries and wages totaling $1,500 have not yet been recorded for January 16 to 31 . q. Prepaid Rent will be fully used up by March 31. r. Supplies on hand at January 31 were $200