how much thc taken oraly is considered a dose?

im looking to make some canna chocolates to sell to the dispensary but im not sure how much cannabis to use. the dispensaries around here list thier edibles with a dose per unit. for example cosmic caramels are 2 doses each.

my question is how much hash/kief/mid grade weed do you think they consider to be an oral dose? i would love to make each chocolate (about 1.5"x1.5"x.5") to be 2-3 doses. im not sure if i wanna use canna butter kief hash or what. any help would be greatly appreciated.

The only experience I have at making edibles are when I make budder and cookies. My budder is extremely potent as it is used against cancer. I put at least an oz of high grade bud plus another 4-5 oz of good shake in a lb of budder. 3/4 of the lb of budder go's into making 40 oatmeal cookies. 1 cookie will wreck you for 5-6 hrs. I think you have to have a goal in mind before you start making your product. Make some and give it to friends to try and get feedback.