Question 61
Polona regularly buys bread rolls and croissants at the bakery. On weekdays, when at least six croissants are bought, the croissants are $15 \%$ cheaper, while at the weekend a $10 \%$ discount is given on the entire purchase. On Tuesday Polona bought 6 croissants and 5 bread rolls and paid $2.27 \text{ €}$. On Saturday she bought 7 croissants, 4 bread rolls and a bag that costs as much as two croissants, and paid $2.52 \text{ €}$. When is it more advantageous for Polona to buy 9 croissants and 8 bread rolls, on a weekday or at the weekend?