Ok, here are the permutations.
If you do 55 lines on Wednesday and 55 again on Saturday, that's a total of 110 lines (£110) therefor leaving you £55 for the Euromillions. This would make for 36 euromillion lines, and £1 left over for your bus fare home.
If you mean a total of 55 lines Wednesday & Saturday combined, this would be only £55, therefor leaving you a nice tidy £110 to lavishly furnish your Euromillions fantasy, ie you could play 73 lines on the Friday.
Naturally speaking as your personal advisor, I'd like to take my usual 20% commision. I might even give some to charity, Who knows?