Staff may be able to help you with advice and such but do not expect them to be experts ESPECIALLY in a store with 50 different areas. I have reasonable knowledge of about 80% of the things we sell, how to use them, what you could replace with them if you're after something else, how to use them differently to accomodate what you're after, what goes with them, etc. But if I don't know the exact quantity you need of this item from an out-of-the-way department I get near no queries from, just appreciate that I'm being honest rather than trying to bullshit my way through and potentially wasting your money or forcing you to come back for more/something else/etc. Because that's what a lot of people do rather than getting yelled at/scolded/etc because you should know about EVERY item in your 12 section store and THIS store (which specialises in the one particular section you're being asking about) trains their staff to be able to help with ALL of this.