Justifying Costco's Membership Fee

It is that time of the year again, where we have to justify the value of Costco's membership. The least expensive Costco membership is$50 per year. I came up with a list of staple items that we always purchase from Costco and compared that items with what it costs at some other retail store.

#	Item Description	Costco	Competitor	Savings
1	Olay Total Effects 32 oz	$29.99	$39.99	$10.00
2	Blue Ribbon White Rice 20lbs	$7.00	$14.00	$7.00
3	Boneless skinless chicken thighs $1.7/lb,  30lbs/year	$51.00	$60.00	$9.00
4	Quinoa, Farro or other speciality grain	$8.00	$16.00	$8.00
5	Quaker Oats (big box) 6 boxes per year	$42.00	$72.00	$30.00
6	Uncle Ben's brown rice	$8.00	$10.00	$2.00
	Minimum Annual Savings			$66.00

We do save on other items as well, but this is the absolute minimum that we will save per year, and then there is always the free snacks and their great return policy on electronic items.