Plz help what is (5a+4b-3c)+(2a-3b+12c

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 jame pay at the end?

Answer pls man im trying to get out of summer school

An ant travels at a constant rate of 30cm every 2 minutes.at what speed does the ant travel per minute