If you are unable to enter a value in the Total dose section when editing a medication you may need to change the settings to ensure that the units of measurement match.

The concentration has to be the same unit of measurement as the dosage to make the calculation. Smart Flow Sheet does not convert them for you. 

The units of measurement need to match before you can enter a value into the total dose section:

If you need to add a new unit of measurement, type it in and make sure you press on the word you have written to add it into your list. 

NOTE: If you have noticed an increasing amount of units of measurement ( / kg, / eye, etc), you can delete unnecessary ones by swiping left on the iPad, then pressing delete: