need help with thr last blank box

Question Help Hector Dolkart Optical Dispensary completed the following transactions during the latter part of March Mar. 15 Purchased office supplies on account $2,700 Mar. 28 Paid $1,800 on account Read the requirements Mar. 15. Purchased office supplies on account, $2,700 Date Accounts and Explanation Dobit Credit Mar 15 Office Supplies 2.700 Accounts Payable 2,700 Purchased office supplies on account Mar 28: Paid $1,800 on account Date Debit Credit Mar 28 Accounts and Explanation Accounts Payable Cash 1.800 1.800 Paid cash on account Requirement 2. The following accounts have been opened for you. Cash (Beginning Balance of $20,000), Office Supplies and Accounts Payable Post the journal entries from Requirement 1 to the accounts, and compute the balance in each account (Use a "Bal posting reference on the proper side of nach account to show the ending balances of the accounts) Cash Accounts Payable Bal 20,000 1.800 Mar 28 Mar 28 1,800 2,700 Mar 15 18,200 Bal Bal Mar 15 Office Supplies 2,700 2,700 Bal