Seasonal demand for summer highs ...

       1.)"Use the slope-intercept formula to determine   the annual increase in inventory" as well as 2.)"Provide monthly   seasonal indices for the given data"          Month Year 1 Year 2 Year 3 Year 4   1 18,000 45,100 59,800 35,500   2 19,800 46,530 30,740 51,250   3 15,700 22,100 47,800 34,400   4 53,600 41,350 73,890 68,000   5 83,200 46,000 60,200 68,100   6 72,900 41,800 55,200 61,100   7 55,200 39,800 32,180 62,300   8 57,350 64,100 38,600 66,500   9 15,400 47,600 25,020 31,400   10 27,700 43,050 51,300 36,500   11 21,400 39,300 31,790 16,800   12 17,100 10,300 31,100 18,900