A teenager created a 3-month financial plan budgeting $500 with expenses including a $20 cellphone, $25 bus pass, $200 for food, $25 for snacks, $30 for internet, $8 for Netflix, $40 for clothes, $90 for entertainment, and $3 for bank fees, leaving $94 for savings or emergencies. The plan also provides useful websites and apps for finding coupons, comparing prices, and tracking spending to help save money.