Your classmate is considering two job offers from two manufacturers. Offer A is a base salary of $$4,000$ per month plus $3\mathrm{.}5\%$ of total sales. Sales are estimated to be $$35,000$ per month. Offer B is a base salary of $$2,000$ per month plus $4\mathrm{.}5\%$ on the first $$500,000$ of annual sales, increasing to $6,5\%$ for all sales over $$500,000.$ Monthly sales are estimated to be $$49,000$ per month. Which offer would produce the highest gross income and what are the estimated annual earnings for the best job?