Swifty Corporation is constructing a building. Construction began in 2020 and the building was completed 12/31/20. Swifty made payments to the construction company of $2880000 on 7/1, $6552000 on 9/1, and $5980000 on 12/31. Weighted-average accumulated expenditures were $3624000. $9432000. $3078000. O $15412000