Please only answer number 7

Fact Set for Palmer Pens, problems 6-8 Assume that Palmer Executive Pens uses 1,250,000 gallons of ink each year. Further, assume that Palmer can order the ink at a cost of $2 per gallon plus fixed ordering costs of $100 per order. The firm's carrying cost is 20 percent of the inventory value, at cost. 6. Refer to Palmer Pens. What is the firm's EOQ? 7. Refer to Palmer Pens. What is Palmer's minimum total inventory cost per year