The total amount that Hailey paid can be represented by the following expression in terms of x:
Total amount = x + 0.07x + 0.20(x + 0.07x)
Simplifying the equation, we get:
Total amount = x + 0.07x + 0.20(1.07x)
Total amount = x + 0.07x + 0.214x
Total amount = 1.284x
Therefore, the expression in terms of x that represents the total amount that Hailey paid is 1.284x.