Brian May, guitarist for Queen, does not know how to price his signature Antique Cherry Special that cost him £316 to make. He knows he wants 75% markup on cost. What price should Brian May ask for the guitar?

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)