hello , if i create a sales invoice and add multiples items along with their quantities and discount per item as the image below, the numbers calculated are wrong because if we do it manually it will give other results

so 1st line should be equal to 53.55

2nd line should be 53.55

3rd line should be 33.15 and it is correct

and the total would be 140.25

and discount amount should be 24.75

basically the problem is if the number is 53.546 it makes it 53.55

any idea of where i can change it , i need the number to be taken as it is with 2 decimals itâ€™s critical because it makes the numbers wrong