please dont copy with chegg, its wrong. plz solve correctly

A product manager of an electronic manufacturing company wants to decide which one of three prototypes of Connecting Devices to produce. Connecting devices act as middleware between networks or computers by binding the network media together. Some of the common connecting devices are routers, bridges, hubs, repeaters, gateways, and switches. The fixed and variable costs of three types of Connecting Devices are shown in the accompanying table. The manager believes that demand for Connecting Devices types A, B, and C will be 50,000, 100,000, or 150,000 Connecting Devices, with probabilities of 30%,30%, and 40%, respectively. The selling price of the Connecting Devices will be $40. a) Develop decision three for this problem. b) Find the expected monetary value for each type, and select the optimal one