"Cull" Lumber from a big box store= cheap 2x4's for convertable picnic table

I found out what the rack in the drive up area of my local Lowes was!
I often see piles of wood and sheets or plywood and such sitting there, but I never paid it much mind-turns out its a clearance rack of sorts they call it the "cull" rack, because they are culling the items from inventory that may be cut, chipped marked etc.
So I was at the store buying something for my Bocce Court and saw this pile of 16ft 2x4's and saw they were only $20 and there was 8 of them- so I picked em up for a "future project".
Needless to say they weren't the truest boards but they worked well enough for something like this. I had to buy a 2x6 to attach the top to because 2x4's aren't wide enough to give proper clearance as the plans showed(and I really didn't want to reinvent the wheel on this) so i bit the bullet and bought a $3 2"x6"x8'
Now if you notice I used all 2x4's for this instead of 2x6 so I adjusted the top to 14 1/8 to accommodate 4 2x4 pieces separated by spacers I use when installing wood floors. I made no change to the seat dimensions, but there is 4- 2x4's vice 3- 2x6's.
Great plan- perfect for more seating on my weekly bocce nights and they hold in excess of 600 lbs easily for those concerned about load limits.
(Note for those curious, that is my Bocce court in the background, it is 10'x60' and built with pressure treated 4x6's and 2x4's and a whole bunch of DG and crushed oyster shells.)