This printer is capable of printing upto 32 pages per minute and has 2 paper trays that can hold 500 pages each. A duplexing unix which allows printing on both sides of a sheet and a 2500 page high capacity paper tray are on order. The cost of paper is a very small part of the cost of printing.
Ink is more expensive.
Duplex printing is of primary use when printing large documents. Less paper needs to be carried around. This printer was funded in part by ECA, Engineering and Computer Science Association.