The importance of proofreading...

So a while ago I ran across this truck in the grocery store parking lot. Sorry for the picture quality, but if you can't make it out, the sign reads:

La"w"s mowed
Cost plenty

I blurred out the phone number, but I can only hope it was right.

While I respect the effort, it shows the importance of double checking when you're unsure of something. Otherwise your company motto might become "cost plenty".