Aggregate Planning: LP model $-2-$ Jan Feb Mar Apr May Jun Jul Aug Sep Oct Dem Nov $3000$ Dec $300025001500200025003000400030002800$ RT $20002210001822192320222218212042245454554545=$ Beginning inventory $=1000$ Working hours $=10$ hours$/$ day Number of people in December $=60$ RT cost Rs$.10/$hour OT cost $=$ Rs$.13/$hour Inventory cost $=$ Rs$.20/$unit$/$month Backlogging cost $=$ Rs$.50/$unit$/$month Hiring cost Rs$.500/$person hired Lay$-$off cost $=$ Rs$.400/$person Subcontracting cost $=$ Rs$.150/$unit Under$-$utilization cost $=$ Rs$.3/$hour One unit consumes $10$ hours of labor $===$