Company B is a new online sweatshirt reseller. During the first month of business, the company made the following purchases and sales of sweatshirts:

March $1$: Purchased $200$ sweatshirts for $$20$ each

March $10$: Purchased $400$ sweatshirts for $$25$ each

March $14$: Sold $50$ sweatshirts

March $25$: Sold $200$ sweatshirts

What would be the cost of goods sold $($COGS$)$ for the month of March if Company B uses First$-$In First$-$Out $($FIFO$)?$

$$5,000$

$$5,250$

$$6,000$

$$7,750$