An answering machine cost a dealer $ $220$ less $31\mathrm{.}5\%,7\%.$ It is regularly priced at $ $212.$ The dealer's overhead is $17\%$ of the regular selling price and the answering machine was cleared out for $ $175\mathrm{.}45.$What is the regular markup based on selling price? What was the percentage rate of markdown at which the answering machine was sold?