Suppose that 20% of fruit flies possess a certain gene. If we randomly select 20 fruit flies find the probability that at least 5 flies in the sample possess the gene. Assum sampling replacement

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?