Answer:
1$
Explanation:
Start by giving all the fractions a common denominator, here we will use 10.
we already have 1/10
1/5 turns to 2/10
and 3/5 turns to 6/10
add those together and get 9/10
9/10 of 10 is 9$, thats how much he spent
Notice you have 1$ left, that is the answer