La Cucina Company sells kitchen supplies and housewares. Lava stone is used in production of molcajetes (mortars and pestles used in the making of guacamole) and is purchased from external suppliers. Each year, 2,500 pounds of lava stone is used; it is used evenly at the rate of 10 pounds per day. It takes La Cucina 4 days from the time of order to the time of arrival of the order.

Required:
Calculate the reorder point.