1. The problem is to find the total sum of the given float amounts: 1000, 1000, and 500. 2. The formula to find the total sum is simply the addition of all amounts: $$\text{Total} = a + b + c$$ where $a=1000$, $b=1000$, and $c=500$. 3. Substitute the values into the formula: $$\text{Total} = 1000 + 1000 + 500$$. 4. Perform the addition step-by-step: $$1000 + 1000 = 2000$$ and then $$2000 + 500 = 2500$$. 5. Therefore, the total sum of the amounts is $$2500$$. This is a straightforward addition problem where you add all the given numbers to find the total.