Basically a user enters their hours in F11 and N69 is a field that counts how many minutes theyve worked since they opened the sheet. I need this to account for their lunch so in my example if that field N69 hits 20 after going up every minute 16,17,18,19,20 when it hits 20 if they are working 8 hours indicated in the F11 field I need the N66 to be subtracted by 30 aka their lunch