Cullumber Centre is an experienced home appliance dealer. Cullumber Centre also offers a number of services tognther with the hume appliances that it sells. Assume that Cullumber Centre sells ovens on a stand-alone basis. Cullumber Centre also seils inutatation services and maintenance services for ovens. However, Cullumber Centre does not offer installation or maintenatice services to customers who buy ovens from gther vendors. Pricing for ovens is as follows. In each instance in which maintenance services are provided, service is separately priced within the arrangentent at $105. Additionally, the incremental amount charged by Cullumber Centre for installation approximates the amount charged by independent of $1,000 among the performance oblipations of the contract. At. Oven Installation Maintenance