Assuming all the shirts are bought, you can buy 13 pieces, 1 170 divided by 13=90 (yuan), one shirt 90 yuan, three pieces are 90*3=270 (yuan), and four skirts =3 pieces of lining, 270.

A: A shirt, 90 yuan, and a skirt are 67.5 yuan.

Test: 8*67.5+7*90

=540+630

= 1 170 (yuan)