PosoKanei — Cheapest Supermarket Basket

Basket cost index — cheapest = 100%

Each bar is that retailer's total for the identical basket, relative to the cheapest. 110% means you'd pay 10% more there.

#	Retailer	Basket total	Index	Extra vs cheapest	Avg / item	Items cheapest
1	Σκλαβενίτης cheapest	€1,943.84	100.0%	—	3.67	127
2	Χαλκιαδάκης	€2,002.95	103.0%	+€59.11	3.78	148
3	My Market	€2,073.51	106.7%	+€129.67	3.91	82
4	Γαλαξίας	€2,112.28	108.7%	+€168.44	3.99	78
5	Synka	€2,113.75	108.7%	+€169.91	3.99	28
6	Μασούτης	€2,121.75	109.2%	+€177.91	4.00	28
7	Κρητικός	€2,132.06	109.7%	+€188.22	4.02	22
8	ΑΒ Βασιλόπουλος priciest	€2,143.17	110.3%	+€199.33	4.04	16

Number of basket items on which each retailer has the (equal-)lowest price.

Compared retailers (basket = products carried by all of them):

My Market Synka ΑΒ Βασιλόπουλος Γαλαξίας Κρητικός Μασούτης Σκλαβενίτης Χαλκιαδάκης

Basket = the 530 products every one of these chains stocks.
Prices are the raw shelf price (current discounts included); the same product id is bought at each retailer, so totals are strictly like-for-like.
This is an unweighted basket — every product counts once, regardless of how often a household actually buys it. Loyalty-card prices are not modelled.
Adding more (smaller-catalogue) chains shrinks the common basket; this run used the 8 selected.