ok, I guess i misread your initial question.
to add the charge regardless of quantity, you wont need the calculations i had you create yesterday, the true price calculation can be deleted and the Total Price calculation can be set back to the original:
[Price] * [Quantity]
the single charge regardless of quantity can be accomplished using only the Charges tab of the eCart object window.
you will need to create 2 charges:
INJ
Triggers:
"Number of Items With A Specific Column Value"
If the Total Number of Items where "ChargeType1" has a value of "INJ" is ">" a value of "0"
Calculations:
Flat rate Charge of "3.89"
DISP
Triggers:
"Number of Items With A Specific Column Value"
If the Total Number of Items where "ChargeType1" has a value of "DISP" is ">" a value of "0"
Calculations:
Flat rate Charge of "7"