Mrs. dodson is shopping for school supplies with her children. vivian selected 2 one-inch binders and 1 two-inch binder, which cost a total of $15. mia selected 2 one-inch binders and 4 two-inch binders, which cost a total of $36. how much does each size of binder cost? a one-inch binder costs $, and a two-inch binder costs $.