using optimization models for resource management - help!

Metal Fabricators, Inc. manufacturers gas grili tanks, Model \# 1420, for four original equipment manufacturers (OEMs). Demand is forecast to be as follows: Quarte 1 - 3,900 tanks, Quarter 24,800, Quarter 35,000, and Quarter 44,100. Due to a hedging program for sheet steel and increases in international tariffs, production cost per quarter vary as follows: Quarter 1$32.90 per tank, Quarter 2$39,20, Quarter 3 - $36.30, and Quarter 4 - $40.60. Due to production contracts with the OEMs, no shortages are allowed. Beginning inventory for Quarter 1 is 420 tanks. At the end of each quarter, inventory holding costs are $6.20 per tank. Formulate this as a linear optimization model but do not solve. Round your answers for the coefficients for objective function to two decimal places and round other answers to the nearest whole number. Use a minus sign where appropriate and do not leave any fields blank, If the canstant is one or minus one, enter " 1 " or "-1" correspondingly. Let: P1= number of units produced in month l, Ii= inventory at the end of month 1 Minimsl=totalB2+Q2+C2P3+P2+ cost The constraints are as follows: Week 1: Week 2: Wek 3: Week 4: Pt it 20 for t=1,2,3 * Itiale Ireedburek