The big items
Qty × $ each = cost. Life is how long it lasts new; age is how old yours is. Leave a row blank to skip it, × to remove it.
Fire escapes, the oil tank, the tree that hates your roof. Name it, price it, give it a life.
Next 10 years
Reserve = cost (grown by inflation) spread evenly over the years it has left. Anything at or past its life shows up as due now. Straight-line, no hold-period rules, no mercy.
