Hitchcock, Inc., uses the high-low method to analyze cost behavior. The company observed that at 12,000 machine hours of activity, total maintenance costs averaged $7.00 per hour. When activity jumped to 15,000 machine hours, which was still within the relevant range, the average cost per machine hour totaled $6.40. On the basis of this information, the variable cost per machine hour was:

The expenditures and receipts below are related to land, land improvements, and buildings acquired for use in a business enterprise. the receipts are enclosed in parentheses. money borrowed to pay building contractor (signed a note) $(276,500 ) (b) payment for construction from note proceeds 276,500 (c) cost of land fill and clearing 11,220 (d) delinquent real estate taxes on property assumed by purchaser 8,340 (e) premium on 6-month insurance policy during construction 12,060 (f) refund of 1-month insurance premium because construction completed early (2,010 ) (g) architect’s fee on building 27,040 (h) cost of real estate purchased as a plant site (land $206,800 and building $55,900) 262,700 (i) commission fee paid to real estate agency 9,620 (j) installation of fences around property 4,030 (k) cost of razing and removing building 10,130 (l) proceeds from salvage of demolished building (4,910 ) (m) interest paid during construction on money borrowed for construction 13,700 (n) cost of parking lots and driveways 17,690 (o) cost of trees and shrubbery planted (permanent in nature) 14,080 (p) excavation costs for new building 2,950 identify each item by letter and list the items in columnar form.