Explanation:
May 7
Credit sales of $4,000 which means accounts receivable will increase by $4,000 and Sales revenue will also raise b y the same amount
May 13
Collection on account of May 7th sales which means the account receivable will go down by $4,000 and cash will increase by $4,000
Journal entries
DATE                   Particulars                       Amount
May 7th           Account receivable (+A) Dr.                 $4,000
                        to Sales revenue (+Equity)          $4,000
                    ( To record the credit sales)
May 13th         Cash (+A)  Dr.                             $4,000
                         to Accounts receivable(-A)         $4,000
                 (To record the receipt of cash) Â