I hope someone can help me with this question, I am new to Zen and have not downloaded or played around with the cart yet, I run an Office Supplies company, I have 100 regular customers, and a catalogue of products that could in theory be up to 50,000 lines, each customer has a core price list of up to 100 products they buy regulaly and this set of 100 products could be different for each customer. each product can have a different price for each customer i.e Customer A may buy a box of envelopes at 80% off RRP, Customer B may buy the same envelopes at 50% off RRP, this could be the same for all 100 cutomers and price lists, can Zen accomodate this multiple pricing and can it be managed via .csv or excel spreadsheets. I hope this makes sense and I hope Zen can do this job.