Calculations we used
(mL collected in graduated cylinder)(1cm^3/mL) = 1 cm^3
(Volume Collected in Can) / (Can Orifice Area) = cm precipitation
(cm precip)(10 mm/cm) = mm precipitation
Can Orifice Area = 41.854 cm^2
Short Calculation = (Volume collected) (0.2389258) = mm of Precipitation