1. The problem is to find the sum of the numbers: 2,700,000.00, 2,100,000.00, 2,100,000.00, 1,200,000.00, 1,200,000.00, and 900,000.00. 2. To find the sum, we add all the numbers together using the formula for sum of numbers: $$\text{Sum} = a_1 + a_2 + a_3 + \cdots + a_n$$ where $a_i$ are the numbers. 3. Adding the numbers step-by-step: $$2,700,000 + 2,100,000 = 4,800,000$$ $$4,800,000 + 2,100,000 = 6,900,000$$ $$6,900,000 + 1,200,000 = 8,100,000$$ $$8,100,000 + 1,200,000 = 9,300,000$$ $$9,300,000 + 900,000 = 10,200,000$$ 4. Therefore, the sum of the given numbers is $$\boxed{10,200,000}$$.