costing model

I have developed an excel cost model and am having some difficulties and would like to employ an expert to help solve the issues I am having. The work book has two input pages, one calculation page and a results page and graphs. I want to be able to trend daily production metrics and use vlookups - but i apear to be only able to run to 25 lookup variables whereas i want to run to 300. Anyway - Its almost there but needs to be made robust and also needs tidyning up and checking. We want an immedate start and a very good standard of professional presentation and result.