Mathematically Challenged!

Last night I needed something to occupy my brain after receiving some bad news so I sat down and worked out a cutting diagram for the camping tables (We can cut four leg braces and a 3'x4' tabletop and a 3'x5' dining table out of one sheet. Woohoo!) and made a list of the materials we needed to buy today for the tables and the break down chests. It didn't take me too long to figure out that the 5' (60") of 1x4 I thought we needed for the chests was not right. What I read as 60 inches was actually 60 FEET! LOL