There is a company running a subscription-based business. A marketing manager of this company found that a customer of the company is expected to, on average, generate $200 of gross contribution per year and the retention rate of the customer is, on average, 85% per year. With 5% of annual discount factor and $500 of acquisition costs per customer, a customer's LTV for the entire life-time is about?

A: $230

B: $350

C: $500

D: $450

E: $850