Week $1=1000$

Week $2=1200$

Week $3=1400$

Week $4=$ Predict using the Exponential Smoothing Forecast $($Smoothing Constant Alpha $=0\mathrm{.}5$

Exponential Smoothing

$F_{t+1}=D_t+(1-)F_t$

where:

$F_{i+1}=$ forecast for time period $t+1($i$.$e$,$ the now forecast$)$

$F_1=$ forecast for time period $t($i$.$e$.,$ the current forecast$)$

$D_1=$ actual value for time period $t$

$=$ smoothing constant used to weight $D_1$ and $)a(1$

$1262\mathrm{.}5$

$2100\mathrm{.}0$

$1500\mathrm{.}0$

$2162\mathrm{.}5$

$1600\mathrm{.}0$