Answer:
The journal entries are as follows:
(a) On July 16,
Account receivable A/c Dr. $1,200
To sales revenue $1,200
(To record Sales)
Cost of goods sold A/c Dr. $720
To Inventory $720
(To record cost of goods sold)
(b) On July 19,
Sales return and allowance a/c Dr. $200
To Account receivable $200
(To record sales return)
Inventory A/c Dr. $120
To Cost of goods sold $120
(To record cost of goods return)
(c) On July 22,
Cash (1,000 × 98%) A/c Dr. $980
Sales discount A/c Dr. $20
To Account receivable $1,000
(To record amount received)