I would like to have a possibility add a label with custom value. I mean I often go with my privat car. Where I have 8 CZK per km. So I have 4 hours and 80 km. And it would be nice click on label, fill custom value ( in my example 8 x 80 = 640 CZK) and it's added to the paycheck. In the day I have 4 hours per 100 CZK = 400 CZK and 80 km = 640 CZK, so together it is 1040 CZK.