A company has the following information for the number of seosnal sales for two years:

$\backslash$table$[[,$number of sales$],[$year $1,],[1,488],[2,321],[3,303],[4,285],[$year $2,],[1,483],[2,156],[3,272],[4,690]]$

Assuming the moving average is computed based on three periods and the forcasting regression equation for the a is $Ft=117+-{0\mathrm{.}17}^{**t}$

The adjusted forecasting for the number of cans in the first period in the third year is