hello, I am taking an accounting class and have a project due. I calculated everything on my own, but for some reason the totals do not add up. Please let me know if you see my error!

Here were the guidelines I followed Dec 1st – Paid December rent of $2,150 with check #801.
Dec. 2nd – Paid $1,450 on Jackson’s Inc. invoice from a previously recorded transaction with check #802.
Dec. 3rd – Collected $700 from Reynolds Co. from a previous engagement in November.
Dec 4th – Completed additional work for Auto Plus, sent invoice #Sp24a for $1,350 due in 1 month.
Dec. 5th – Paid employee from work previously expensed in Nov. with payment due Dec. 5th using check #803.
Dec. 8th - Paid $1,600 to cover all utilities for the month of Dec using check #804.
Dec. 9th - Completed $500 worth of work for a repeat customer who pays cash immediately.
Dec. 10th - Collected $800 from Auto Plus from a previous engagement in Nov.
Dec. 11th - Jack Fredrick, the owner, withdrew $3,250 for personal use using check #805.
Dec. 12th - Our employee earned two weeks of pay amounting to $1,700, to be paid Dec. 23rd.
*employee took vacation from Dec. 15th-Dec. 31st. No pay will accrue*
Dec. 15th – Completed a large job for Reynolds Co. for $12,000. Sent invoice #Sp24b due Jan. 31st.
Dec. 16nd – Collected $5,900 from Reynolds to pay off some of their balance.
Dec. 22md – Paid our employee for the work expensed Dec. 12th using check #806.
Dec. 23rd - Purchased land on a note for $10,000 to be used for construction of a new office building.
Land and Notes Payable will have account numbers of 150 and 240, respectively.
Dec 24th-Dec. 31st – Owner took off the rest of the year.
Adjustments (due with Part 1)
1. The equipment was used for the third year.
2. Prepaid insurance was adjusted for Oct-Dec usage.
3. Unearned revenue was updated to show 3 months of work completed.
4. A final count of supplies showed $300 remaining.