The Blossom Store is an experienced home appliance dealer. Blossom Store also offers a variety of services together with the home appliances that it sells. Assume that Blossom Store sells dishwashers on a standalone basis. Blossom Store also sells installation services and maintenance services for dishwashers. However, Blossom Store does not offer installation or maintenance services to customers who buy dishwashers from other vendors. Pricing for dishwashers is as follows:

$\backslash$table$[[$Dishwasher only,$$770$