Cast Iron Company, on each nondelinquent sale, receives revenues with a present value of $$1,210$ and incurs costs with a value of $$1,005.$ Cast Iron has been asked to extend credit to a new customer. You can find little information on the firm but you believe that the probability of payment is no better than $0\mathrm{.}80$ and that there will be a repeat order in one year if payment occurs.

If the discount rate is $17\%,$ calculate the minimum probability of payment on the repeat order at which credit can be extended.