John plans to buy a new house for his family. He went to a bank and got the news that the current best mortgage rate is 5% compounded semi-annually over a 25-year period. If he can save $4,200 each month for mortgage payment, what would be the maximum housing price that John could afford?

a) $754,326

b) $725,500

c) $750,100

d) $820,223

e) $722,132