Scenario $12\mathrm{.}3$

Tom Bergman, owner and operator of the Earplug Superstore, is reviewing the costs associated with the store's best$-$selling hearing aid, the BZ$15.$ The data available to Mr$.$ Bergman concerning this device follow.

The Earplug Superstore operates $52$ weeks a year.

Use the information in Scenario $12\mathrm{.}3.$ Tom cuts the ordering cost in half by implementing a streamlined processing system. How many fewer units should he now order each time he places an order?

Less than or equal to $10$ units

Greater than $10$ but less than or equal to $15$ units

Greater than $15$ but less than or equal to $20$ units

Greater than $20$ units