Write program that builds a summary of electronic sales. DeltaComputing is a manufacturer of popular ePhone, ePads, and eWatches. The company also sells their products to wholesale customer. Primary product costs are: ePhones: $$499\mathrm{.}99$; ePads: $$399\mathrm{.}99$; and eWatches are $$299\mathrm{.}99.$ In addition, DeltaComputing sells a high$-$end computer $($an ePC selling for $$2999\mathrm{.}99),$ but ePC units are only available to business$/$government customers.