Help me please 12x-30​

Jamie went to home depot. she bought 25 bags of soil that cost $9 per bag. she bought 15 pots at $8 each, and she bought 23 bags of pebbles at $15 each. she used a coupon that gave her $5 off for every 100 dollars she spent. how much did jamie pay at the end?

In a column proof the right column states your reasons

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.