Easy, subtract
$8.10
-
$3.49
so,
8.10
-
3.49
since 1-4, is not possible, you must borrow making your problem,
10
7.11 10 kind of tricky, but it's re-written as this to be able to subtract.
8.1 0
-
3.49
So,
7-3=4
10-4=6
10-9=1
Making it $4.61.
Thus, Jim spent, $4.61.