Mr Store who runs his photocopy business working 8 hours per day process 100 scripts. He estimates his labour cost to be 69 per hour. Also he has estimated that the total material cost for each script is approximately 2; while the daily expenses are 28. Calculate the multifactor productivity. In an effort to increase the rate of the photocopy process to 150 scripts, he decides to change the quality of ink thus raising the material cost to 2.5 per day. Is the new productivity better than before? if Mr Store would like to increase the photocopy process to 150 scripts without sacrificing the initial multifactor productivity, by what amount has the material costs to be increased