On its first day of business, ABC purchased twenty units of inventory at a cost per unit of $$2\mathrm{.}00.$ On its second day of business, ABC purchased an additional $30$ units at a cost per unit of $$1\mathrm{.}00.$ On day three ABC sold ten units. ABC makes the FIFO cost flow assumption. Which of the following is correct?

Group of answer choices

$1)$ At the end of day three, ABC$$s cost of sales is $$20$ and its inventory is $$50.$

$2)$ At the end of day three, ABC$$s cost of sales is $$10$ and its inventory is $$60.$

$3)$ At the end of day three, ABC$$s cost of sales is $$14$ and its inventory is $$56.$

$4)$ None of the above.