Final answer:
The correct entry for progress billing in a Capital Projects Fund is a debit to Expenditures—construction cost for $18 million, accounting for a 10% retainage on a $20 million billing.
Step-by-step explanation:
The correct answer to the question about which account and amount is debited to record the progress billing in a Capital Projects Fund, when a contractor bills a city for $20 million but the city retains 10%, is option c. Expenditures—construction cost is debited for $18 million. When the city retains 10% ($2 million) of the payment, the actual amount recorded as an expenditure is the net amount due to the contractor after the retainage, which is $18 million ($20 million - 10%). The account titled 'Expenditures - construction cost' typically reflects the cost incurred for construction in progress on the financial records of a Capital Projects Fund. Therefore, the entity debits the expenditures account, acknowledging the progress billing net of the retainage.