Answer:
Stengel Co. is in a contract to perform maintenance service for Laplante Inc. The revenue accounted for the first 2 years will be $100,000 per year, which when received in cash, will be credited to Laplante's account in the books of Stengel. However, in the third year, with the modification of the contract revenue, the disclosure will be done for $100,000 only, with a debit to Contract.
Modification Costs, aggregating $ 20,000, which anyways needs to be expensed off. The amount to be received from Laplante Inc. at the end of the third year in cash, which will be credited to their account, will total $80,000 only.