Archie runs a small mineral exploration business (as a sole proprietorship). In 2016, he purchased land (for $68,000) where he suspected a magnesium deposit was located. He incurred $18,000 of exploration costs related to the development of the magnesium mine in 2016 and an additional $22,000 of exploration costs in 2017. Archie elected to deduct these expenditures for regular tax purposes in both 2016 and 2017. In 2018, given a decline in magnesium prices, Archie chose to sell the property for $66,000, rather than bring the mine to production. What AMT adjustments are required in 2018 related to mine exploration expenditures and the sale of the land