Let N be the number of items sold and p the price.
Since the variation is inverse, then the relation between N and p is:

For N=20000 and p = $9.5, we get the formula:

If p = 8.75, then the number of items sold can be computed using the formula:
You have to multiply and add!
Answer:
Listen to music or watch a video about what your about to study. Or do what I do... eat while studying
Step-by-step explanation: