Notice This 1=15 The cost in this example is then: Chr = 17.647 x 0.105 C = $ C = $1.853 2. Calculate the per hour operating cost of the factory described in step 5 of Skill 2 to the nearest dollar if the power rate is $0.085/kWh. Chr Phr x CkWh Chr = $ It should be approximately $800. 3. Calculate the per hour cost of operating a motor if the apparent power delivered to the motor is 12.5 kW and the power rate is $0.10/kWh. C = $ 4. Calculate the cost per year of operating the motor in step 3 if the motor is operated 80 hours per week. = $ 5. Calculate the power rate that is being charged based on the following information. = $4.75 P = 24.5 kW C = $ kWh 6. Solve the following design problem: You are an engineer at a textile mill that operates 120 hours per week. Your plant currently has a power factor of 35% and is consuming 50 kWh. You want to improve the power factor to 80% while maintaining the present power consumption. Detemine the savings per hour that the plant will gain by improving the power factor to 80% if the power rate is $0.090/kWh. HINT Ho much less apparent power will the power company need to supply if the power factor improves to 80% ?