Which sequence describes the long-run adjustment in a perfectly competitive market, if firms in the market are currently making short-run economic profits

Recently, algonquin books partnered with barnes & noble to offer a unique if you purchase one of 12 paperback books published by algonquin, you can choose one of 12 e-books for $3 (a much lower price than a regular e-book). the goal is to increase traffic in bookstores.

The movement of an economy from one condition to another and back again

Connors academy reported inventory in the 2017 year-end balance sheet, using the fifo method, as $154,000. in 2018, the company decided to change its inventory method to lifo. if the company had used the lifo method in 2017, the company estimates that ending inventory would have been in the range $130,000-$135,000. what adjustment would connors make for this change in inventory method?