A one-pound mixture of nuts contains cashews (70 ¢ per

A one-pound mixture of nuts contains cashews (70 ¢ per ounce), almonds (60 ¢ per ounce), and walnuts (80 ¢ per ounce) and costs $11.10. The mixture contains the same weight of cashews as walnuts. How many ounces of each type of nut does the mixture contain?