After graduating from dental school two years ago, Dr. Lauren Farish purchased the dental practice of a long-time dentist who was retiring. In January of this year she had to replace the out-dated autoclave equipment she inherited from the previous dentist. Now as she is preparing her budget for next year, she is concerned about understanding how her cost for sterilizing her dental instruments has changed. She has gathered the following information from her records:

Month	Number of instruments used	Total autoclave cost
January	626	$7,436
February	526	6,510
March	726	7,050
April	926	9,070
May	826	7,774
June	1,026	8,554
July	1,226	10,006
August	1,126	9,896

What is the variable cost of sterilizing an instrument using the new equipment?(Round answer to 2 decimal places, e.g. 15.25.)

Variable cost

$

per instrument

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What is the fixed cost of the autoclave equipment?(Round answer to 0 decimal places, e.g. 5,275.)

Fixed cost

$

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What is the cost formula that Dr. Farish should use for estimating autoclave sterilization costs for next years budget?

Formula of total cost

($4.99 # of instruments) + $3,885($4.99 # of instruments) - $3,885($3,885 # of instruments) - $4.99($3,885 # of instruments) + $4.99($3,885 # of instruments) + $4.99($4.99 # of instruments) - $3,885($3,885 # of instruments) - $4.99($4.99 # of instruments) + $3,885

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If Dr. Farish estimates she will use 1,162 instruments next month, what cost should she include in her budget for instrument sterilization?(Round answer to 0 decimal places, e.g. 5,275.)

Total cost$