ABC Inc. sells patio sets. Monthly sales for a seven$-$month period were as follows:

?

Month Sales $(000)$ ?Unites

Feb $19$

Mar $18$

Apr $15$

May $20$

Jun $18$

Jul $22$

Aug $20$

Forecast September sales volume using a weighted average approach using exponential smoothing with a smoothing constant equal to $0\mathrm{.}20,$ ?assuming a March $$forecast of $19(000)$