Oriole Centre is an experienced home appliance dealer. Oriole Centre also offers a number of services together with the home appliances that it sells. Assume that Oriole Centre sells ovens on a stand$-$alone basis. Oriole Centre also sells installation services and maintenance services for ovens. However, Oriole Centre does not offer installation or maintenance services to customers who buy ovens from other vendors. Pricing for ovens is as follows.

$\backslash$table$[[$Oven only,$$1,080$