Develop Reports for Openerp v6.1

Hello, I'm looking for a developer with experience working with Openerp/Odoo v6.1 to develop some quick reports for the payroll module. The reports are based on payroll batch. The most important report required is the monthly payroll details for all staff including all allowances and deductions in spreadsheet format. Some other derivatives of this main report are also required. The reports are required in excel and pdf. Some work has been done and can act as starting point but the developer may also choose to start afresh if preferred. A sample of the required spreadsheet is attached. I look forward to a quick engagement.