The following lots of Commodity $D$ were available for sale during the year.

Beginning inventory

$10$ units at $$60$

First purchase

$25$ units at $$65$

Second purchase

$30$ units at $$68$

Third purchase

$15$ units at $$75$

The firm uses the periodic inventory system, and there are $25$ units of the commodity on hand at the end of the year.

What is the ending inventory balance of Commodity D using FIFO?

a$.$ $$1,805$

b$.$ $$1,575$

c$.$ $$3,585$

d$.$ $$1,685$