In the personal computer industry, the reason for the fall in prices and the increase in quantity after 1980 was: September 22, 2022 by 8i9x6 mainly a function of resource prices. primarily due to technological change and an increase in the number of sellers. a result of a dramatic decrease in U.S. wages. a result of a dramatic decrease in foreign wages. See Answer primarily due to technological change and an increase in the number of sellers.