11. katherine okikiolu runs a janitorial service that contracts directly wil large office buildings. one building has 4,225 square feet per floor and 3 of office space. katherine's rate for janitorial services is $5.35 per square foot annually. to the nearest cent, what is the monthly charge for cleaning this office building? (a) $11,266.67 (c) $30,138.34 (b) $22,603.75 (d) $60,276.67