The cost of the ink isn't particularly relevant. It is the use that you want to look at.
PC World just did a study of the reality of reporting of costs. One of the Cannon AIO"s came out on top , but don't recall specific model.I know it scored well , but it wasn't the MP 830.
They did determine the cost per page reports of most all company's were within decent specs , so you can use that as a guide.
Try going to the PC World or PC MAG web sites and doing search for printing costs.