Answer:
$2 and $0.42 per shirt.
Step-by-step explanation:
Given: US factory produce 4.5 million shirts.
Total cost of producing shirts is $9 million.
Foreign factory produce 2500000 shirts.
Total cost of producing shirts is $ 1050000.
As we know cost of producing 4.5 million shirts is $9 million
So, we will unitary method for finding cost of one shirt.
∴ Cost of 1 shirt produced =

∴Cost of producing 1 shirt by US´s textile factory is $2.
Similarly, as cost of producing 2500000 shirts by foreign factory is $1050000.
∴Cost of 1 shirt produced =

∴Cost of producing 1 shirt by foreign textile factory is $0.42.
The labour cost per shirt of America and foreign factory is
respectively.