The sales of water purifiers in a shop in $4$

consecutive months are as given below. The

magnitude of difference in the forecast for the

exponential

the

next month

using

smoothening method with a smoothening

constant of $\mathrm{0.3}$ and weighted moving average

method with the weights as $\mathrm{0.1},\mathrm{0.2},\mathrm{0.3}$ and

$\mathrm{0.4}$ willbe$\_\_\_$water purifiers $($in Integer$)$