Answer:
e. 141
Explanation:
We will multiply the values of the last four month by the weight estimated for each one. Then we add them together to get the budget sales for October
Month     Units  weight  weighted amount
September 160 x 40% Â Â Â Â 64
August    120 x 30%     36
July       150 x 20%     30
June       110 x 10%     11  Â
October: Â Â Â Â Â Â Â Â Â Â Â Â Â Â 141