At the risk of being sneered at, I kind of like the following...

At the risk of being sneered at, I kind of like the following attention to detail. This is the sort of thing which will provide confidence in the DFS.

first fill reagents and consumables – included in the estimate, developed from the quantities and costs in the operating cost estimate and process design criteria. Nominally based on 30 days storage, however in this instance they are based on one full charge for the ball mill and first fill of the fuel farm (which is two weeks supply of diesel). In most cases, equipment suppliers will supply required first-fill lubricants with the supplied equipment. However, a provisional cost for first-fill lubricants was included in the estimate to allow for any potential omission.