Evaluate the following expression using the values given: find x^3 - 2y^2 - 3x^3 + z^4 if x = 3, y = 5, and z = -3

Yolanda wanted to buy a total of 6 pounds of mixed nuts and dried fruit for a party she paid 21.60 for mixed nuts and 11.90 for dried fruit did yolanda but enough mixed nuts and dried fruit for the party