1. The problem is to add the numbers 329, 149.44, 1274103.22, and 480975.80 together. 2. First, align the numbers and add them step-by-step. $$329 + 149.44 = 478.44$$ 3. Next, add the result to 1274103.22: $$478.44 + 1274103.22 = 1274581.66$$ 4. Finally, add the last number 480975.80: $$1274581.66 + 480975.80 = 1755557.46$$ Therefore, the total sum is $$1755557.46$$.