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     |   Invoice derived from registration number:       4.20001          |
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     |                                                                    |
     |   To: Computer Knowledge                                           |
     |       P.O. Box 91176                                               |
     |       Los Angeles, CA 90009               Date: ________________   |
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     | From:                                                              |
     |       ________________________________  (please print clearly)     |
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     |       ________________________________                             |
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     |       ________________________________                             |
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     |       ________________________________                             |
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     |                       Make checks payable to: Computer Knowledge   |
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     | Product description                                 |    Amount    |
     |-----------------------------------------------------+--------------|
     |                                                     |              |
     | ___ Registration for TUTOR.COM program and          |              |
     |     initial distribution files................$12   |   $________  |
     |                                                     |              |
     | Entitles user to latest version of TUTOR.COM,       |              |
     | and a registration number that will result in       |              |
     | payments for any other users who register using     |              |
     | that number as a reference.                         |              |
     |                                                     |              |
     | ___ Tutorial building tools and a registered        |              |
     |     copy of TUTOR.COM.........................$25   |   $________  |
     |                                                     |              |
     | Entitles user to latest version of TUTOR.COM        |              |
     | as above plus tutorial building tools that allow    |              |
     | the user to write tutorials for use with the        |              |
     | program. The tools come with a manual.              |   =========  |
     |                                                     |              |
     |                            Total enclosed...........|...$________  |
     |                                                     |              |
     |                                                     |              |
     | Large users: Check here for info about paper        |              |
     |              copies of the tutorials and other      |    __        |
     |              related products.......................|.../__/       |
     |                                                     |              |
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                                      Thank you