checkout for Frank:
5 milk 1.19 5.95
5 apples 3.15 15.75
1 butter 2.29 2.29
1 cookies 4.99 4.99
total_sum: 28.98
checkout for Mary:
2 apples 3.15 6.30
4 cheese 1.90 7.60
2 bread 2.59 5.18
4 bananas 1.29 5.16
1 oranges 0.99 0.99
total_sum: 25.23
checkout for Paul:
2 biscuits 1.45 2.90
3 apples 3.15 9.45
2 yogurt 3.65 7.30
3 butter 2.29 6.87
1 cheese 1.90 1.90
1 milk 1.19 1.19
4 cookies 4.99 19.96
total_sum: 49.57