Question

help? How do you do it ?

Answer 1

magic

Answer 2

thanks for that Uncle

Answer 3

any time.
ok so check what the bill will be for the first option

500min + 250txt
-300min-100txt
=200min+150txt

Answer 4

so the first option
200min x 6p/min + 150txt x 10p/txt = 1200p+150p =1350p

Answer 5

second option
500min + 250txt - 300min - all txt = 200min
the bill will be 200min x 6p/min = 1200p

Answer 6

mathemagic