While exploring Effects of Adding with SWG, I found that the decimal point does not work in the FC generated. You can work around by just checking values above and below (eg. 2 ppm and 3 ppm if your daily loss averages 2.5 ppm), but it sure would be nice if we could just plug in the closest value. There is a decimal point on the pop-up keypad (iPhone version), but it does nothing.