Board Thread:Questions and answers/@comment-33888574-20191221171307/@comment-39814790-20191221212434

According to the Ballistic Ball page, a 5 pack of balls costs $4.99. I'd say that the pack was from 2005, around the time that Ball Blasters existed. So, if we adjust inflation, we get about $6.57 per pack.

You mentioned you have two packs of balls, so if we do 6.57 x 2, we get our final cost at $13.14.