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

Beginning inventory

First purchase

Second purchase

Third purchase

$10$ units at $$55$

$25$ units at $$60$

$30$ units at $$65$

$15$ units at $$70$

The firm uses the periodic inventory system. During the year, $60$ units of the item were sold.

The ending inventory cost rounded to the nearest dollar using weighted average cost is

a$.$ $$1,150$

b$.$ $$1,375$

c$.$ $$1,353$

d$.$ $$1,263$