Leaphart Kennel uses tenant-days as its measure of activity;an animal housed in the kennel for one day is counted as one tenant-day.During May,the kennel budgeted for 2,800 tenant-days,but its actual level of activity was 2,840 tenant-days.The kennel has provided the following data concerning the formulas to be used in its budgeting: 
The net operating income in the planning budget for May would be closest to:
Definitions:
Huntingtin
A protein associated with Huntington's disease, caused by genetic mutations leading to neurodegeneration.
Phenylalanine
An essential amino acid required for growth and protein synthesis, obtained through diet.
Phenylketonuria
A genetic disorder characterized by the body's inability to break down the amino acid phenylalanine, leading to its accumulation.
Metabolism
The sum of the chemical reactions that occur in a cell.
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