esla Electric uses $4,000$ toggle switches a year. Switches are priced as follows: $1$ to $499,$ $$2$ each; $500$ to $999,$ $$1\mathrm{.}75$

each; $1000$ to $1499,$ $$1\mathrm{.}25$ each; and $1,500$ or more, $$1\mathrm{.}20$ each. It costs approximately $$9$ to prepare an order and

receive it$,$ and annual carrying costs are $40$ cents per unit. What are the optimal total costs? NOTE: You must show

all your work $$ including EOQ and all necessary TC calculations.

Quantity Unit Price

$1499$

$500999$

$10001499$

$1500+$

$ $2\mathrm{.}00$

$ $1\mathrm{.}75$

$ $1\mathrm{.}25$

$$1\mathrm{.}20$