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	€2,103.95	100.0%	—	3.62	143
2	Χαλκιαδάκης	€2,168.30	103.1%	+€64.35	3.73	166
3	My Market	€2,241.30	106.5%	+€137.35	3.85	90
4	Γαλαξίας	€2,282.25	108.5%	+€178.30	3.92	85
5	Synka	€2,292.14	108.9%	+€188.19	3.94	29
6	Μασούτης	€2,298.11	109.2%	+€194.16	3.95	30
7	Κρητικός	€2,311.14	109.8%	+€207.19	3.97	22
8	ΑΒ Βασιλόπουλος priciest	€2,318.61	110.2%	+€214.66	3.98	17

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 582 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.