Ayayai's Gyros had the following results last month: Sales revenues equal $$5500,$ direct costs of labor and food ingredients were $$2750,$ other cost of goods sold were $$400,$ and fixed period expenses equal $$900$ per month. Which of the following statements is correct?a$.$ Ayayai's gross margin is equal to $$2350$b$.$ Ayayai's degree of operating leverage is $4\mathrm{.}26$c$.$ Ayayai's gross margin is equal to $$2750$d$.$ Ayayai's operating income is equal to $$2350$