function help pre set value and subtraction numbers

[hackertom]

i use this formula

=SUMPRODUCT((OFFSET($A8;0;1;1;372)<>"")*(IF(OFFSET($A8;0;1;1;372)=$NX$16;-2;IF(OFFSET($A8;0;1;1;372)=$NX$17;-1;1))*(OFFSET($A$3;0;1;1;372))))

when user add symbol in cell NX16 count -2 if add NX17 count -1, i want some help in this function to start number subtraction from 48 and stop to 0.... any edit help lease?

 

[Fluff]

As mentioned in your previous thread.
Please supply cross post link.

While we do not prohibit Cross-Posting on this site, we do ask that you please mention you are doing so and provide links in each of the threads pointing to the other thread (see rule 13 here along with the explanation: Forum Rules).
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[hackertom]

https://www.excelforum.com/excel-fo...5284-sum-function-count-help.html#post4974022

https://www.mrexcel.com/forum/excel-...idays-e-g.html