During 2021, Prospect Oil Corporation incurred $5,000,000 in exploration costs for each of 20 oil wells drilled in 2021. Of the 20 wells drilled, 14 were dry holes. Prospect uses the successful efforts method of accounting. Assuming that Prospect depletes 30% of the oil discovered in 2021, what amount of these exploration costs would remain in its 12/31/2021 balance sheet?