Use the information below to answer the following questions.

The following lots of a particular commodity were available for sale during the year:

Beginning inventory

First purchase

Second purchase

Third purchase

$10$ units at $$30$

$25$ units at $$32$

$30$ units at $$34$

$10$ units at $$35$ method?

a$.$ $$655$

b$.$ $$690$

c$.$ $$620$

d$.$ $$659$