$1\mathrm{.}6$George Kyparisis $($using data from Problem $1\mathrm{.}5)$determines his costs to be as follows: Labor: $$10$ per hour Resin: $$5$ per pound Capital expense: $1\%$ per month of investment Energy: $$0\mathrm{.}50$ per BTUShow 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.