Answer:
1. Accounts receivable A/c Dr $9,700
   To Service revenue $9,700
(Being service provided is recorded)
2. Cash A/c Dr          $9,506
Sales Discount A/c Dr $194   ($9,700 × 2%)
   To  Accounts receivable  A/c  $9,700
(Being cash received recorded and the remaining balance is reported to the cash account in the debit side)
Explanation:
The journal entries are shown below
On March 12
Accounts receivable A/c Dr $9,700
   To Service revenue $9,700
(Being service provided is recorded)
On March 20
Cash A/c Dr          $9,506
Sales Discount A/c Dr $194  ($9,700 × 2%)
   To  Accounts receivable A/c  $9,700
(Being cash received recorded and the remaining balance is reported to the cash account in the debit side)