I totally agree with the opinion of DSB1954UK.
I do not see the point of having to make separate calculations and then compare the results.
CII internally calculates the values and then uses them in their calculation routine.
Dave, why do not you test if it's possible to have the calculated values in the form of a report? If you do a survey among the users, you will see that this new report will be very welcomed by the analysts because it will be a great time saver and an indicator of error in the data entry
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RBDF