Actual sales for January through April are shown below.

$\backslash$table$[[$ObservationMonth$,$Actual Sales $($A$)$ Forecasted Sales $($F$)],[1,$January $18],[2,$February $23],[3,$March $20],[4,$April $16],[5,$May$]]$

Use exponential smoothing with an alpha factor $=0\mathrm{.}2$ to calculate the forecast for Moy from the above data. Assume the forecast for the initial period $($January$)$ is $18.$