purchases = [["matte pink paint","floral wallpaper","magnolia gloss paint","weed killer","picture frame","plug socket","doorbell","matte white paint","tiles","grass seed","lawn mower"],["decorating","decorating","decorating","gardening","decorating","electrics","electrics","decorating","decorating","gardening","gardening"],[6.99,7.99,5.49,2.99,8.99,6.99,15.99,4.99,19.99,1.99,129.99]]

reductions = [(),(),(),(),(),(),()]
col = 0
row = 0
total = 0
num = 0
price = 0

while row<len(purchases[1]):
  if purchases[1][row] == "decorating":
    total = total + purchases[2][row]
  row = row + 1

if total > 20:
  row = 0
  while row<len(purchases[1]):
    if purchases[1][row] == "gardening":
      reductions[num] = row
      num = num + 1
    row = row + 1

row = 0

while row<len(purchases[1]):
  print(purchases[0][row],"  £",purchases[2][row])
  price = price + purchases[2][row]
  if row in reductions:
    discount = purchases[2][row]/10
    print("-£",discount," discount")
    price = price - discount
  row = row + 1

print("--------------------------")
print("TOTAL = ",price)