The customer gave you:
-- $100
-- $5 winning ticket
-- $2 winning ticket
Total . . . $107
You gave the customer:
-- $17.01 in the form of gas
-- $5 in the form of a $5 lottery ticket
-- $2 in the form of two $1 lottery tickets
-- $3 in the form of a $3 lottery ticket
Total . . . $27.01
In order to be even, you must give the customer another
($107 - $27.01) = $79.99 in change