A B Production Volume (units) Total Cost ($) 400 3900 450 4900 550 5300 600 5800 700 6300 750 6900 Production Target Est. Cost ($) 500 5 5 그 B . 9 D a. Compute bi and bo (to 1 decimal). b1 bo Complete the estimated regression equation (to 1 decimal). ý b. According to this model, what is the change in cost in dollars) for every unit produced (to 1 decimal)?