Rainwater Events Calculator v4

Dear all, my 2 question refer to the rainfall events calculator. 1) the percentil is calculated on the historical data sheet. The amount is expressed in mm. On the next page "strategies" the "runoff volume required to be managed on site" has to be filled in in cu m. Does it have to be calculated in the following manner? (inteded percentil value - Depression storage- infiltration loss)*365 days * A? I am a bit confused by the use of the 2 different units "mm" and "cu m"... 2) is it correct to multiply the surface area for each Strategie with ist runoff coefficient to obtain the runoff volume managed? Thank you very much for your answer in advance!