If full legalization were to occur in all 50 states and D.C., the U.S. marijuana retail market could top $35 billion in revenue by 2020, according to estimates from independent research firm GreenWave Advisers.
In the US, 1 cup = 8 fluid ounces (*not identical to the avoirdupois ounce which is weight). In the US, one standard measuring cup contains 8 fluid ounces, but there is also a dry measure using the term cup, equal to 8 ounces.
One cup wet or dry is equal to 8 ounces. So basically the answer is 4 oz = 1/2 cup.   But of course there is a difference between dry weight which generally is measurâ¦ed in US pound (lb) while the rest of the world uses grains(gr) , and grams (gm, mg[0.065gm =60mg=1gr}, kg {1000g = 1 kg}.