I sell the bulk of them through United Producers. If somebody wants one for slaughter,I sell live weight,based on what I've been getting through U.P. I've got an electronic scale and weigh them just before I deliver them to the slaughter house.
A good fat beef breed will hang 60-65% of live weight,then cut 60-65% of hanging weight.
If you want to sell hanging weight,they say to figure 220% of live weight price.
If you click the link,you can choose the location nearest to you and get this weeks actual prices.