* Data For What-If;

data history;



year    income     unitcost     price    quantity

-------------------------------------------------

1976    2221.87    3.31220     0.17903    266.714

1977    2254.77    3.61647     0.06757    276.049

1978    2285.16    2.21601     0.82916    285.858

1979    2319.37    3.28257     0.33202    295.034

1980    2369.38    2.84494     0.63564    310.773

1981    2395.26    2.94154     0.62011    319.185

1982    2419.52    2.65301     0.80753    325.970

1983    2475.09    2.41686     1.01017    342.470

1984    2495.09    3.44096     0.52025    348.321

1985    2536.72    2.30601     1.15053    360.750