abby consumes only apples. in year 1, red apples cost $1 each, green apples cost $2 each, and abby buys 10 red apples. in year 2, red apples cost $2 each, green apples cost $1 each, and abby buys 10 green apples. assume that year 1 is the base year in which the consumer basket is fixed. a. compute the cpi for apples for each year. assume that year 1 is the base year in which the consumer basket is fixed. how does your index change from year 1 to year 2?