Sunjay is trying to calculate the customer lifetime value for a particular segment of customers using the CLV formula from his textbook. Based on historical information, he knows that the retention rate for this segment is fairly consistent at $92\%$ on a month$-$to$-$month basis, but since he sells his product through multiple channels, at different margins, he needs to figure out an average margin to use in the equation. He again turns to his historical data, and looks at the last month's sales, where he sold $10,000$ products to $2,500$ customers.His variable costs for each product sold are $$10.$ Last month, he sold $3,000$ products online for $$20$ each. In his various stores, he sold $6,000$ products for $$30$ each. He also has a mail$-$order service where he sold $1,000$ products for $$25$ each. What value should he input for his Margin $($$$)$ in the CLV calculation, assuming one month is one period?Question $5$ options: $$66$ $$16\mathrm{.}50$ $$15$ $$17\mathrm{.}50$ The correct answer is not listed