Exposure concentration

Exposure
Here we have the opportunity to enter the duration of the exposure in a separate field, while the concentration/radiation dose must be entered in a text field. This means that it is not possible to sum up the total concentration for several exposures. The whole point of our use of this module is to be able to make sure that the upper limit for radiation exposure is not exceeded during a given time period (day/month/year). Without a summation in the program, we do not have the opportunity to do this without using Excel in addition.
Is it possible to add a drop-down field for exposure concentration/radiation dose/unit, and ask the program to calculate total radiation dose per exposure and total over time?
(I'm still 99% sure that the program is unable to retrieve this information into their dashboard function as it is set up now, as retrieving the correct information from text fields is relatively complicated even using macros. If there is a drop-down list or specified field for value + designation, however, it should be unproblematic to retrieve the information)