I need help checking my journal entries.

During the first quarter of 2022, the following transactions occurred:

1.		On February 1, Sheffield collected fees of $10,800 in advance. The company will perform $900 of services each month from February 1, 2022, to January 31, 2018.
2.		On February 1, Sheffield purchased computer equipment for $7,875 plus sales taxes of $525. $2,625cash was paid with the rest on account. Check #455 was used.
3.		On March 1, Sheffield acquired a patent with a 10-year life for $8,400 cash. Check #456 was used.
4.		On March 28, Sheffield recorded the quarters sales in a single entry. During this period, Sheffieldhad total sales of $140,000 (not including the sales referred to in item 1 above). All of the sales were on account.
5.		On March 29, Sheffield collected $133,000 from customers on account.
6.		On March 29, Sheffield paid $16,100 on accounts payable. Check #457 was used.
7.		On March 29, Sheffield paid other operating expenses of $95,500. Check #458 was used.
8.		On March 31, Sheffield wrote off a receivable of $200 for a customer who declared bankruptcy.
9.		On March 31, Sheffield sold for $1,810 equipment that originally cost $12,000. It had an estimated life of 5 years and salvage of $1,000. Accumulated depreciation as of December 31, 2021, was $8,800 using the straight line method. (Hint: Record depreciation on the equipment sold, then record the sale.)