Prepare all necessary journal entries for 2021. (Use Materials, Cash, Payables for costs incurred to date.) (Credit account titles are automatically indented when the amount is entered. Do not indent manually. If no entry is required, select "No Entry" for the account titles and enter for the amounts.) Account Titles and Explanation Debit Credit (To record cost of construction) (To record progress billings) (To record collections) (To record revenues) (To record construction expenses) Calculate the amount of gross profit to be recognized each year, assuming the completed-contract method is used. (Do not leave any answer field blank. Enter Ofor amounts. Enter negative amounts using either a negative sign preceding the number e.g. -45 or parentheses e.g. (45).) 2021 2022 2020 $ Gross profit/ (loss)