$($EOQ$)$ Garden Variety Flower shop uses $750$ clay pots a month. The pots are purchased at $$2$

each. Annual carrying costs per pot are estimated to be $30\%$ of cost$.$ Ordering costs are $$20$

per order.

a$.$ How much should the store order at one time?

b$.$ How many times per year should the store order?

c$.$ How many months should be between two consecutive orders?

d$.$ What is the store$$s minimum total monthly cost $($without considering purchase cost$)?$