A retailer uses a markup$-$on$-$selling$-$price approach to setting retail prices. If the retailer sells a product to a customer for $$12\mathrm{.}50$ and uses a $25\%$ markup$-$on$-$selling$-$price then the wholesale price for the product is:

Question $5$ options:

$$15\mathrm{.}00$

$$12\mathrm{.}50$

$$40\mathrm{.}00$

$$10\mathrm{.}00$