300
Krystal and Brenda each improved their yards by planting rose bushes and ornamental grass. They bought their supplies from the same store. Krystal spent $660 on 50 rose bushes and 21 bunches of ornamental grass. Brenda spent $255 on 25 rose bushes and 3 bunches of ornamental grass. What is the cost of one rose bush and the cost of one bunch of ornamental grass?
Rose bush: $9
Ornamental grass: $10