The phone bill for a company consists of both fixed and variable costs.Refer to the 4-month data below and apply the high-low method to answer the question.(Round your intermediate calculations to two decimal places) 
What is the fixed portion of the total cost?
Definitions:
Zygote
The earliest developmental stage of an embryo, formed when a sperm cell fertilizes an egg cell, which then begins to divide and grow.
Germinal Period
The initial two weeks of prenatal development following conception, characterized by rapid cell division and the beginning of cell differentiation.
Implantation
The process by which a fertilized egg attaches to the lining of the uterus to begin pregnancy.
Uterine Wall
The muscular layer lining the uterus, which thickens during the menstrual cycle and pregnancy.
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