It's a cost accounting question

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Power expense of machine is Rs, 5,625, other variable expenses are Rs. 8,375 and total fixed expenses are Rs. 10,000. The machine consumes 10 units of power per hour at the cost of Rs. 7.50 per unit. Calculate machine hour rate. Economic Order Quantity 300 Unit, cost per unit Rs. 30, Cost of placing an order Rs, 15, Cost of storing units 10%. How many units is in Annual consumption