Batch update pricing for single customer in Sage 100 2013

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Hi, 

I'm trying to find a way to remove the price overrides someone created for a single customer, which has over 3,000 price overrides. It's too much to delete manually. I'm wondering if there's an easy way to simply delete all of the price overrides and whatever other price scheduling was created for this customer and only this customer. I need to be cautious about doing this, so I don't clear other information. The data I'm trying to use is found in Account Receivable, Main, Customer Maintenance, More - Items, Pricing

In Visual Integrator, Main, Import Job Maintenance, I can see there's a job in the list called "ITEM CUST PRICE" with description "Import customer specific pricing" - this seems like something someone else created. 

I can't find a clear guide about doing what I need to do exactly - it isn't apparent to me how to handle this sort of issue, although I understand it uses a CSV file, but exactly what I need to do isn't clear to me and I don't want to make mistakes here, like clearing out every customer's pricing. If anyone has any ideas, I'd appreciate the help. I'm not a professional, just working with my family here. 

Thank you