Answer:
(It is assume that completed unit have been transferred to next department)
The jounal entries for each transaction is given below.
Cost of units completed in the Cutting Department, $17,000
Debit WIP stamping Dept $ 17,000
Credit WIP cutting Dept $ 17,000
Cost of units completed in the Stamping Department, $30,000
Debit WIP polishing Dept $ 30,000
Credit WIP stamping Dept $ 30,000
Cost of units completed in the Polishing Department, $35,000
Debit Finished good $ 35,000
Credit WIP polishing Dept $ 35,000
Sales on account, $50,000
Debit GOGS $ 40,000
Credit Finished good $ 40,000
Debit Receivable Account $ 50,000
Credit Sales $ 50,000