Bill owns a strata lot. His unit is 2,200 square feet. The other seven units have a combined area of 17,350 square feet. The common property has an area of 4,200 square feet. The annual common expenses are $45,000. What is Bill's monthly share of the common expenses?

(1) $421.99

(2) $5,063.94

(3) $475.50

(4) $347.36