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.
Apply the formula to calculate days in inventory. You calculate the days in inventory by dividing the number of days in the period by the inventory turnover ratio. In the example used above, the inventory turnover ratio is 4.33. Since the accounting period was a 12 month period, the number of days in the period is 365. Calculate the days in inventory with the formula 365/4.33=84.2{\displaystyle 365/4.33=84.2}. It takes this company 84.2 days to sell its average inventory.