Is a jumbo sized egg or a medium egg better value?

Q. Is a jumbo sized egg or a medium egg better value?
A. Based on buying a box of 6 free range eggs the jumbo egg is better value

• Medium egg 44g total with 4g fat and 5g protein Cost £0.24 each or £5.45 per kilo
• Jumbo egg 63g total with 6g fat and 8g protein Cost £0.28 each or £4.40 per kilo
• At best a Jumbo egg offers 45% more but doesn't cost than much more. 

If we bought eggs by weight, here's what you'd see:

• The contents of a large egg weighs 60g the shells weighs 8g or 12% of its weight. 
• 40% of this 60g is the fatty yolk (24g) ; 
• 60% of the 60g is the protein-rich egg white (36g). 
• Overall it is 13% protein; 10% fat
• An egg is 25% useful; 75% is water.