PSUs come in boxes of 8 units. Try like this.
Thanks. Surprising results when I priced out all the options for UPS.
Qty 6 => 335.87
Qty 7 => 334.2 (Not a typo)
Qty 8 => 381.94
Ended up ordering 7 which means Wu gives me free shipping cost on one PSU. I wonder if they have an off by one error in the shipping calculation cost.