How many three-digit numbers can be made using the digits 2,4 and 6? (Digits can be repeated and you don't have to use all the digits so that 224 would be allowed)

Margaret is purchasing a house for $210,000 with a 15 year fixed rate mortgage at 4.75% interest she has made a 5% down payment the house is valued at 205,000 and the local tax rate is 3.5% homeowners insurance 600 per year what are her total monthly payment