Answer with formula and steps.

Joanna is currently working a total of 8 hours per day to produce 250 dolls. She thinks that by changing the paint used for the facial features and fingernails (assuming that this is the only change and there is no change to everything else), she can increase the rate to 350 dolls per day. Total material cost for each doll is approximately $3.50; she has to spend $20 in the necessary supplies (expendables) per day; energy costs are assumed to be only $4.00 per day; and the labor cost is $10 per hour. a) Viewing this from a total (multifactor) productivity perspective by taking all the given inputs into consideration, what are her productivity at present and the one with the new paint in terms of dolls per dollar? (15 points) b) If she uses the new paint, by what amount could Joanna's material cost per doll increase without reducing total (multifactor) productivity? (10 points)