How do you solve for this question and more specifically how do you get the (planned order receipt and planned order release) for the problem?? I know this question has been solved on here but it does not explain how they got the numbers used for planned order receipt and planned order release! Thank you in advance, im having a hard time learning this material!

Q2) Clancy's Motors has the following demand to meet for custom manufactured fuel injector parts. The holding cost for that item is $2 per month and each setup costs $80. Lead time is 0 months. Calculate the planned order releases using: (a) the EOQ technique, and (b) the POQ technique. And What are the costs of each plan, including the holding cost of any inventory left over after month 7? What technique performance is better. 4 Month Requirement 1 400 2 150 3 200 5 100 6 150 7 250 150 Answer: (a) The monthly holding cost = $2/month Average monthly demand = ??? units The EOQ = ??? units Total inventory held = ??? units Setup costs = $??? Holding cost = $???? Total cost = = $???? (6) POQ Interval = ?.??, round to #month. Total inventory held = ? units Setup costs = $??? Holding cost = $? Total cost = $