Luna Company is developing a cost formula for its packing activity.Discussion with the workers in the Packing Department has revealed that packing costs are associated with the number of customer orders, the size of the orders, and the relative fragility of the items (more fragile items must be specially wrapped in bubble wrap and Styrofoam). Data for the past 20 months have been gathered.

+ Month Packing Number of Weight of Number Cost Orders Orders of Fragile Items 1 41,200 9,500 21,300 1,060 2 59,700 14,700 33,000 1,490 34 42,300 12,100 20,600 1,040 4 31,900 8,300 18,400 830 5 91,300 20,300 45,500 3,640 6 137,000 32,000 67,000 5,840 7 84,100 19,300 55,100 1,690 8 64,500 15,700 40,800 730 9 72,300 14,200 52,400 1,320 10 148,300 38,000 81,600 2,340 11 502,000 128,100 281,900 12,940 12 584,800 131,400 349,600 12,880 13 38,700 9,800 21,700 860 14 48,700 12,800 28,600 870 15 58,200 15,100 28,700 1,420 16 58,900 13,800 31,500 1,360 17 74,100 16,800 44,400 2,770 18 123,700 31,700 77,500 1,930 19 97,900 22,700 62,100 1,660 20 76,500 16,400 38,600 1,340