Eric makes 27 doller every 4 1/2 how much does she many hours if she makes 45 doller . Someone help I need you to explain plz

Will mark the brainliest.paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each?