George Kyparisis 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.

                             Last Year             Now

Units produced         1,000                1,000

Labor (hours)               300                   275

Resin (pounds)               50                    45

Capital invested ($)   10,000          11,000

Energy (BTU)               3,000              2,850

Please show how you got answer step by step.