The forecasted inventory level in week $3[$F $3]$ was $40.$

The actual inventory level in week $3[$A $3]$ was $60.$

Use an exponential smoothing model with

$=0\mathrm{.}9$ to forecast the inventory level in week $4.$

Ft $=($alpha$)$ At$-1+(1-$ alpha$)$ Ft$-1$

Round your answer to the nearest integer.