Happy camera is a retail outlet that deals exclusively with security cameras. The manager is trying to decide on an inventory and reorder policy for economic everyday use of a security camera. Each economic model camera costs $80 each and demand is about 800 per year distributed evenly throughout the year. Reordering costs are $70 per order and holding costs are figured at 25% of the cost of the item. The shop is open 300 days a year (6 days a week and closed two weeks in March for Spring break). Lead time is 40 working days. Determine the following: a) Optimal reorder quantity b) Optimal reorder point c) Number of orders per year d) Total annual variable cost