Express the costs of consumables (over $12,100) to operate printer services offered for free to Chem majors, over a period of 1.5 years. Does not include the cost of the $2.5K printer itself.

Summary

Consumables = (Ink + maintenance kits) + paper = $10,200 + $1,930 = $12,130 over 33 months.

This comes to about $4,411/year.

Data and analysis

Page counts

Dates

Count of
months

Avg pages per months
(including summers)
Most uses is Jan/Feb. and Aug/Sept

At 1.53 cents/ page,
for just ink
(a consumable)

At  0.36 cents/ page,
for just maintenance kit
(another consumable)

Cost for both
consumables
(NOT paper)

300,000

May 2011 - Nov 2012

19 months

15,000 pages /month

$4,585

$1,080

$5,670

240,000

Dec 2012 - Feb 2014

14 months

16,000 pages/ month

$3,665

$865

$4,530

Total: 540,000

May 2011 - Feb 2014

33 months

15,430 pages/ month

$8,250

$1,945

$10,200

Hardware costs, including "consumable" maintenance kits

Printer's initial cost, including 3 year warranty: $2,500

  • Amortizing cost of printer over 540K pages printed comes to 0.46 cents per page.

Cost for maintenance kits, up to now: $1,945

  • 10 have been installed for the most recent 240,000 pages, at $86.40 each: $864 + $1 = $865
  • Thus estimate we 1.25 additional kits (~12.5 kits) for the first 300K pages printed: $1,080

Thus, $4,445 spent so far on hardware, including maintenance kits.

Ink cost calculations

Total ink costs: $8,250

Usage Dec 2012 - Feb 2014

Ink Stick color

Use

6 Sticks per package

Cost per package
(These are Michael Hint's costs;
Lars may pay more?)

Total costs

Cyan

28

4.67

$69.65

$325.26

Magenta

24

4.00

$69.65

$278.60

Yellow

22

3.67

$69.65

$255.62

Black

76

12.67

$221.40

$2,805.14

 

 

 

Total ink costs for 240K pages:

$3,665

  • $3,665 for 240,000 pages comes to 1.53 cents per page, on average.
  • Thus, estimate that an additional 300,000 pages used previously (1.25 as much again) would cost about $4,585.

Paper costs

Cost for paper, up to now: $1,930

  • 0.575 cents per page, if buying cheap and you don't care about the environment.
  • Total of 335,000 sheets of pater used.
    • 149,000 paper sheets used for 240,000 pages printed.
    • Thus estimate that an additional 186,000 paper sheets used for previous 300,000 pages printed.

Paper purchase cost options

0.575 cents/ page for Staples® Copy Paper, LETTER-Size, 92/104 US/Euro Brightness, 20 lb., 8 1/2" x 11", 5,000 Sheets/Ct (if $28.77 for 5000 sheets).

1.03 cents / page for Staples® 30% Recycled Copy Paper, LETTER-size, 92/104 US/Euro Brightness, 20 lb., 8 1/2"H x 11"W, 5,000 Sheets/Ct ($51.59 for 5000 sheets)

  • Contains at least 10% post-consumer recycled content

0.67 cents/ Staples® 100% Recycled Copy Paper, LETTER-size, 92/104 US/Euro Brightness, 20 lb., 8 1/2"H x 11"W, 5,000 Sheets/Ct ($33.43 for 5000 sheets)

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