Initially, a backpack cost was $50; when it increased by $5, the price became $50+$5 = $<<50+5=55>>55
The price of a ring-binder $20, when it reduced by $2, the price became $20-$2 = $<<20-2=18>>18
If she wanted to buy 3 ring-binders, she spent $18*3 = $<<18*3=54>>54
In total, Julieta spent $55+$54 = $<<55+54=109>>109
#### 109