Answer and Explanation:
The journal entries are shown below:
On Mar 12
Account receivable Dr $9,100
To Service revenue $9,100
(Being the service provided on the account is recorded)
For recording this we debited the account receivable as it increased the assets and credited the service revenue as it also increased the revenue
On Mar 20
Cash $8,918
Sales discount ($9,100 × 2%) $182
To Accounts receivable $9,100
(Being cash received recorded)
For recording this we debited the sales discount and cash as it increased the discount and assets and credited the account receivable as it reduced the assets