PHP Adding 2 decimal points numbers (money) gives wrong results in total amount

Question

I have an customer invoice table in my MySQL database with a DECIMAL(10,2) field called price.

When fetching these values in php and calculating a sum amount,

Answer 1

If you need accuracy of 2 decimal points:

1. multiply value by 100
2. do your operations
3. divide by 100 and use number_format where appropriate