3 grams of cocaine

depends on what kind.

Reggie (just straight weed) is usually around 50 - 60$ for an OZ in Texas.

Popcorn (Corn) about 90- 100

Dro(hydro) about 240+ depending on strain.

If you have 3 ounces you could ether make 165 Or you could make up to 600+

Just depends on who the buyer is and what kind it is.