A1. For $3 \mathrm{~kg}$ of oranges and $5 \mathrm{~kg}$ of lemons, we pay a total of $8.40 €$. For $5 \mathrm{~kg}$ of oranges and $4 \mathrm{~kg}$ of lemons, we pay a total of $8.80 €$. How much do we pay in total for 2 kg of oranges and $3 \mathrm{~kg}$ of lemons?
(A) $7.20 €$
(B) $5.20 €$
(C) $3.60 €$
(D) $5.60 €$
(E) $4.80 €$
A1. We write the system of equations $3 P+5 L=8.40$ and $5 P+4 L=8.80$. Solving the system of equations, we get $P=0.80 €, L=1.20 €$. We calculate $2 P+3 L=5.20 €$.