Based on the given costs, here is a budget based on a fixed income:

Needs:
- Water: $1.5
- Food: $20
- Clothes: $50

Total cost of needs: $71.5

Wants:
- Xbox: $139.99
- Back scratcher: $1.25
- Toy boxing glove: $25
- Horseback riding: $30-80 (depending on cost per person)

Total estimated cost of wants: $196.24 - $236.24

Budget breakdown:
Needs: $71.5
Wants (using estimated maximum cost for horseback riding): $307.24

Total budget: $378.74

It is important to note that the cost of horseback riding can vary depending on location and specific services offered. It is recommended to research and plan accordingly to stay within budget.

in second graders wording

My budget is $378.74. I need to spend $71.50 on things like water, food, and clothes. I can spend up to $307.24 on things I want, like an Xbox, a back scratcher, a toy boxing glove, and horseback riding. I need to be careful with how much I spend on horseback riding because it can cost between $30 to $80. So, I need to make sure I don't spend too much on it.