Answer:
The Journal entries are as follows:
(a) On March 3,
Cash A/c Dr. $773,685
Service Charge Expense (1% × $781,500) A/c Dr. $7,815
To Account Receivable $781,500
(To record the sale of the receivables.)
(b) On May 10,
Cash A/c Dr. $4,416
Service Charge Expense (4% × $4,600) A/c Dr. $184
To Sales Revenue $4,600
(To record the sale of the merchandise)