Any source for the calculations that calculator uses? A quick search says alcohol can be detected in blood up to 12 hours[1]. How many doobies does it take to

Any source for the calculations that calculator uses? A quick search says alcohol can be detected in blood up to 12 hours[1]. How many doobies does it take to stay high for 8 hours? [1] https://www.ncjrs.gov/pdffiles1/ojp/181103.pdf https://www.ncjrs.gov/pdffiles1/ojp/181103.pdf