An electronics store expects to sell 900 laptops at a steady rate next year. The manager of the store plans to order these laptops from the manufacturer by placing several orders of the same size spaced equally throughout the year. The ordering cost for each delivery is $14 for the setup costs and $1 per laptop. The carrying costs, based on the average number of laptops in inventory, amount to $7 per year for one laptop.

If $C(x)$ is the inventory cost (which is the sum of the ordering costs and the carrying costs) and $x$ is the number of orders .
$C(x) =$

How many orders should the store manager place?

(you will lose 50% of your points if you do)