Answer:
Book value on date of sale = Cost - Accumulated depreciation
Book value on date of sale = $30,000 - $28,500
Book value on date of sale = $1,500
Gain on disposal = Sales amount - Book value on date of sale
Gain on disposal = $3,500 - $1,500
Gain on disposal = $2,000
Journal entries
Date Account Titles Debit Credit
Cash A/C $3,500
Accumulated depreciation A/C $28,500
To fixed asset $30,000
To gain on disposal $2,000.