Sticht & Kaferstein 20 estimated that the blood THC concentrationsproduced in a 70kg person smoking 15mg THC would peak at 7-8 minutes,after 30 minutes between 14-42ng/ml, and at 60 minutes between 7.5-14ng/ml.3.3 McBay 21 compared THC and THC-COOH levels in a study involving smokedmarijuana cigarettes.ticht & Kaferstein 20 estimated that the blood THC concentrationsproduced in a 70kg person smoking 15mg THC would peak at 7-8 minutes,after 30 minutes between 14-42ng/ml, and at 60 minutes between 7.5-14ng/ml.3.3 McBay 21 compared THC and THC-COOH levels in a study involving smokedmarijuana cigarettes.
1 Days in A/R: This figure represents the number of days of A/R outstanding, based on your average daily charge volume. 2  To calculate it, take your total current receivables (net of credits) divided by your practiceâs average daily charge amount.
To calculate working days 30 days from today, if today is May 18, 2013 then use the following formula: =NETWORKDAYS(TODAY(),TODAY()+30). You get 21 days. Calculate number of working days between today and September 22, 2013 excluding holidays. =NETWORKDAYS(TODAY(),â09/22/2013â³,B2:B19). Resulted 87 days. Calculate number of working days between two dates. =NETWORKDAYS(â5/18/2013â³,â5/18/2014â) you can also specify the cell references that contain dates. Or if you are feeling more geeky you can play with DATE formula within this formula.