What factors affect a companys gross profit ratethat is, what can cause the gross profit rate to increase (i.e., go up) and what can cause the gross profit rate to decrease (i.e., go down? Give one example of something that could decrease gross profit rate and one example of something that could increase gross profit rate. Please try not to use the same type of example for these examples (i.e., increase or decrease of the same type of item).