Two independent methods of forecasting based on judgment and experience have been prepared each month for the past $10$ months. The forecasts and actual sales are as follows:

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$\backslash$table$[[$Month$,$Sales,Forecast $1,$Forecast $2],[1,845,845,820],[2,835,800,830],[3,835,795,810],[4,850,840,835],[5,770,770,795],[6,845,765,806],[7,795,760,815],[8,845,825,780],[9,785,825,845],[10,855,840,845]]$

a$.$ Compute the MSE and MAD for each forecast. $($Round your answers to $2$ decimal places.$)$

Answer is complete but not entirely correct.

$\backslash$table$[[,$MSE,MAD$],{[}^2$ Forecast,$997\mathrm{.}50,27\mathrm{.}50],[$Forecast$,11,971\mathrm{.}00,28\mathrm{.}90]]$

b$.$ Compute MAPE for each forecast. $($Round your intermediate calculations to $5$ decimal places and final answers to $4$ decimal places.$)$

$\backslash$table$[[$MAPE F$1,\%]]$

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