We are thinking about doing the customized M&M's as party favors but I have no idea how many to order. We want to do small circular tins that are 2" diameter and 0.75" deep. I am thinking they will hold about 10-15 plain M&Ms. So with 200 guests we need about 2000 to 3000 M&M pieces. Unfortunately, on the website they sell the M&Ms by the pound and give you no indication of how many pieces per pound. Any help figuring this out would be appreciated.