Answer :
cool long stuff
so the problem is
he has $20 (fake)
so she charged the mand 10 but it was fake so
she charged him 10 because if he gave her 20 and she gave him 10 then she gained 10 and lost 1 pair of shoes
then
10 was fake so so far she lost 10
then if she gave the pharmacist 2 20 dolllar bills then she lost 40+10 dollars
she lost $50
so the problem is
he has $20 (fake)
so she charged the mand 10 but it was fake so
she charged him 10 because if he gave her 20 and she gave him 10 then she gained 10 and lost 1 pair of shoes
then
10 was fake so so far she lost 10
then if she gave the pharmacist 2 20 dolllar bills then she lost 40+10 dollars
she lost $50
$40 . . . the man made off with the $10 shoes and the $10 in change, then the pharmacist recovered his loss of $20. So out of her pocket, she lost $40.