Solve it properly with steps and calculations

4) A tractor manufactmee has orders for 3,4,6 and 5 tractors in the months of Ia. rouy, Febuary, March, and Aprit, respe ctively. Tractors produced in one month and stored to meet demand in another month incur a holding charge of $100pec tractor left in stock at the end of the month and the production costs are given in the Lnollowina table: How should the company schedule the production to meet the demand, and do So at mimimal cost? ( Assume that the company cannot have final inventony of mone than 3 tractors pee month)