Minimum sales of PVC pipes should be 1500.
Step-by-step explanation:
Monthly profit from the sale of PVC pipe can be described as P(x) = 6.45x - 9675
Here x = number of PVC pipes sold.
To avoid the loss means there is no profit but with no loss.
So by putting p(x) = 0
0 = 6.45x - 9675
6.45x = 9675
= 1500
Therefore,to avoid the loss minimum number of pipes sold should be 1500.