(This is part one of a two-part series. Part two will publish Tuesday.)Calculating the correct amount of compensation in a case where leased equipment was damaged seemed simple — Indeck Power Equipment Co. wanted Graphic Packaging to pay repair costs plus lost rental income — but it wasn’t so simple.Graphic Packaging, asking U.S. District Judge Steven C. Seeger to toss the claim for lost rental income based on Circuit Judge Frank H. Easterbrook’s opinion in Linc Equipment Services v. Signal Medical …