4. Downtown Company has consistently used the percentage-of-completion method of recognizing income. In 2018, Downtown started on an $18,000,000 construction contract that was completed in 2020. The following information was taken from Downtown's 2018 accounting records: Progress billing Costs incurred Collections Estimated costs to complete $ 6,600,000 $ 5,400,000 $ 4,200,000 $10,800,000 What amount of revenue should Downtown recognize on the contract in 2018