George Kyparisis (using data from Problem 1.6) determines his costs to be as follows: Labor: $

Question:

George Kyparisis (using data from Problem 1.6) determines his costs to be as follows:
• Labor: $ 10 per hour
• Resin: $ 5 per pound
• Capital expense: 1% per month of investment
• Energy: $. 50 per BTU
Show the percent change in productivity for one month last year versus one month this year, on a multifactor basis with dollars as the common denominator.