The Johnson Company manufactures expensive medical diagnostic equipment. It plans to meet all of its projected demand $($given below for the next year by quarter$).$ The firm plans to use a constant production rate of $300$ units$/$quarter$.$ Production costs are $$20,000$ per unit and holding costs are $$2,000$ per quarter per unit. Assume that no on$-$hand inventory exists at the beginning of Quarter $1.$

Quarter $1234$

Demand $200300400300$

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Find the regular production and ending inventory.

What is the cost of this production plan?