A store estimates their holding costs at $25\%$ of purchase price $($COGS$)$ and incurs a fixed cost of $$50$ for each order. Demand for an item is $1,600$ units per year. A supplier offers a price of $$16\mathrm{.}00$ each for quantities of $250$ or fewer and a price of $$15\mathrm{.}80$ for quantities over $250$ units.

What is the difference in annual procurement $($purchase$)$ costs between the regular and discount?