Answer:
D. 1.20.
Explanation:
300 dollars x 4 multiplier = 1,200 dollars in the economy.
There are 1,000 goods in the whole economy
1,200 dollar purchase 1,000 goods
on average: $1,200 / 1,000 units = $1.20/per unit
with 1.20 dollar you can purchase a single good
Notice: this means average is 1.20 dollars it do not implies all goods are worth 1.20 dollars