If Barbara saved 40% of the money she needs for the shoes, then the remaining 60% of the cost is equal to $20.00. We can set up a proportion to solve for the total cost of the shoes:
40% / 100% = $20.00 / x
where x is the total cost of the shoes in dollars.
To solve for x, we can cross-multiply and simplify:
40% * x = 100% * $20.00
0.4x = $20.00
x = $20.00 / 0.4
x = $50.00
Therefore, the total cost of the shoes is $50.00.