$11\mathrm{.}8.$ The local fire department uses $10,000$ alkaline flashlight

batteries per year, which cost $$4$ each. The cost of ordering

batteries is estimated to be $$50.$ The current interest rate suggested

by the city council is $25\%.$ The sales rep has recently suggested

that you could get a discount of $2\%$ for orders of $2000$ batteries at a

time. Should you take advantage of this special offer?