Want some salt with that Burger?

I did a quick check of salt content of basic burgers at several fast food places - adjusted for a 1/4 basic burger (113.5 gm), the equivalent mg / 1/4 lb burger  came out to be 184 mg for Five guys, 304 for IN and OUT,  428 mg for Wendy's, 516 for Hardees and a whopping 590 mg for McDonalds.
 
In comparison, the reported salt on a medium order of McDonald fries (117 gm) is 270 mg - less than half the sodium content of their basic burger.