Answer :
3,807,000 + 4,339,000= 8,146,000
or if you wanted it like this:
3,807,412 + 4,339,789 = 8,147,201 (8,147,201 Rounded)
or if you wanted it like this:
3,807,412 + 4,339,789 = 8,147,201 (8,147,201 Rounded)
rounded to the nearest hundred the first number is 3,807,800 and the second number is 4,339,800 and the number of copies sold in the last two years was 8,147,210 copies