FIFO and LIFO costs under perpetual inventory system

The following units of an item were available for sale during the year:

Beginning inventory

$34$ units at $$45$

Sale

$23$ units at $$68$

First purchase

$21$ units at $$46$

Sale

$18$ units at $$69$

Second purchase

$23$ units at $$48$

Sale

$22$ units at $$69$

The firm uses the perpetual inventory system, and there are $15$ 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?

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b$.$ What is the total cost of the ending inventory according to LIFO?