The following units of an item were available for sale during the year:Beginning inventory$28$ units at $$48$Sale$18$ units at $$67$First purchase$29$ units at $$49$Sale$26$ units at $$68$Second purchase$24$ units at $$50$Sale$15$ units at $$70$The firm uses the perpetual inventory system, and there are $22$ units of the item on hand at the end of the year.a$.$ What is the total cost of the ending inventory according to FIFO?$fill in the blank $1$b$.$ What is the total cost of the ending inventory according to LIFO?