ABC is a computer retailing store. Its actual and forecast demands for the past six months are given in the table below.

Month

Actual demand

Forecast demand

$1$

$100$

$95$

$2$

$97$

$100$

$3$

$113$

$105$

$4$

$111$

$110$

$5$

$110$

$108$

$6$

$105$

$102$