Answer:
The company should place an order every 2 days
Explanation:
The EOQ or economic order quantity is the quantity which minimizes the inventory related costs. The EOQ is calculated as follows,
EOQ = √(2 * D * O) / H
Where,
EOQ = √(2 * 30000 * 20) / 40
EOQ = 173.2050808 gallons rounded off to 174 gallons
If the company orders using the EOQ, then at an annual demand of 30000 gallons, the number of times that company should order the EOQ is,
Number of orders = 30000 / 174 = 172.4137931 or 173 orders per year
If the company needs to order 173 times per year, the company should place an order every x number of days.
x = 365 / 173
x = 2.10982659 days rounded off to 2.11 days or every 2 days