it's require to some technical knowledge of openerp in reports mean to say how to deal with reports

Seems to new in OpenERP then need to follow below instructions may be helps you

1.You need to have the openERP Report Designer installed into your current database(module name:OpenOffice Report Designer - base_report_designer)

Plugin here:

 bazaar.launchpad.net/~openerp/openobject-addons/7.0/view/head:/base_report_designer/plugin/openerp_report_designer.zip (copy and paste link and then click 'download file')

2.Install the plugin provided by the module into LibreOffice/OpenOffice from Tools->Extension Manager, restart the office suit.

3.A new menu should appear 'OpenERP Report Designer', Connect to the current database by clicking on 'Server Parameters'.

4.After that you can create a new report or modify existing one.

5.Click on 'Modify Existing Report' under 'OpenERP Report Designer' then choose the desired report. In your case purchase quotation report

6. Make changes, in sxw , then click on 'Send to the server'.

Hope this help you then vote me UP

Thanks

dsouzajoseph199@gmail.com