A product is processed by two departments during its manufacturing in the following order: machining and assembly. In $2020,$ the company was able to practice an average selling price of $ $3\mathrm{.}22/$unit$.$ In $2021,$ due to competition, it was forced to practice an average sale price of $ $2\mathrm{.}85/$unit$.$ The following data refer to the product:

$\backslash$table$[[$Year$,$Department,Production,Raw material $($$$/$unit$),\backslash$table$[[$Labor$],[($hours$/$unit$)]],\backslash$table$[[$Labor cost$],[($$$/$hour$)]]],[2020,$Machining,$20,000,0\mathrm{.}45,0\mathrm{.}15,4\mathrm{.}16],[$Assembly$,18,500,0\mathrm{.}05,0\mathrm{.}08,5\mathrm{.}12],[2021,$Machining,$23,600,0\mathrm{.}42,0\mathrm{.}12,4\mathrm{.}50],[$Assembly$,22,200,0\mathrm{.}05,0\mathrm{.}06,5\mathrm{.}60]]$

a$)$ Calculate the total productivity measure and the partial measures for raw materials and labor for this company for both years.

b$)$ What do these measures tell you about the company?

Tip: keep in mind that output is a finished product. Solve using Excel please.