Answer:
On 6 March there is a debit balance of $10,400 cash in the cash book
Explanation:
Prepare a Cash Book Account as Follows:
Debits:
Mar.1 Shareholders Equity               7,000
Mar. 6 Trade Receivable                 7,800
Credits:
Mar .2 Rent                            (  700)
Mar. 3 Equipment                      ( 3,000)
Mar. 4 Office Supplies                   ( 700)
Balance in Cash on March​ 6              10400 Â