$***$Company Q uses the FIFO $($First$-$In$,$ First$-$Out$)$ inventory valuation method. It began the year with $100$ units of product A$,$ each costing $$10.$ During the year, it purchased an additional $200$ units at $$12$ each. By the end of the year, it sold $250$ units. Calculate the COGS using the FIFO method.