Step 1 To Set Group Names
Navigate to 'System config' >> 'Customer group'
Click the icon 'New' to enter group name and description

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Step 2
Navigate to 'Custmer/Sales' >> 'Customer', under the column 'Discount customer group', click 'Select' to allocate one customer group to your customer

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Step 3
Navigate to 'Product>>Product', under the column 'Price', set the price for each customer group

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