Product’s prices:
The total price of each product is calculated as follows:
A) If the field 
is provided:
B) If the field is not provided:
Summary totals:
A) If you do not provide 
, nor 
nor 
:
The sum of all total prices, all of them as calculated above.
:
If the field is provided:
If the field is not provided:
If, let’s say, is provided for product A and 
is provided for product B, then the final will be calculated by the combination of the two methods.
:
B) If you provide , but not nor
:
Exactly the value that you provide, with two decimal places.
:
As in case A)
:
As in case A)
C) If you provide , but not nor
:
As in case A)
:
Exactly the value that you provide, with two decimal places.
:
As in case A)
D) If you provide , but not nor
:
As in case A)
:
As in case A)
:
Exactly the value that you provide, with two decimal places.
E) If you provide and , but not
:
Exactly the value that you provide, with two decimal places.
:
Exactly the value that you provide, with two decimal places.
:
As in case A)
F) If you provide and , but not
:
Exactly the value that you provide, with two decimal places.
:
As in case A)
:
Exactly the value that you provide, with two decimal places.
G) If you provide and , but not
:
As in case A)
:
Exactly the value that you provide, with two decimal places.
:
Exactly the value that you provide, with two decimal places.
H) If you provide , and
:
Exactly the value that you provide, with two decimal places.
:
Exactly the value that you provide, with two decimal places.
:
Exactly the value that you provide, with two decimal places.