Answer:
79,785
Explanation:
The computation of the purchase needed is shown below:
= February material + march material - January material
where,
February material = 11,918 units × 5 board feet = 59,590
March material = 8,277 × 5 board feet × 20% = 8,277
January material = 11,918 units × 5 board feet × 20% = 11,918
Now put these units to the above formula
So, the total units would equal to
= 59,590 + 8,277 + 11,918
= 79,785