open pit mining costs per ton

Mining | Britannica.com- open pit mining costs per ton ,Even then, the overall cost per ton of ore delivered to the processing plant would be significantly higher than from the open pit; to pay for these extra costs, the grade of the underground ore would have to be correspondingly higher. Surface miningAssume the open pit mining the costs are 275ton of ore OP ...Assume the open pit mining the costs are 275ton of ore OP and a stripping cost from MNGN 210 at Colorado School of Mines