[REF]
bzr revid: mra@mra-laptop-20100624112515-gke6kl0kvcx1p2ec
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@ -48,7 +48,7 @@ class sale_order_line(osv.osv):
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return res
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_columns = {
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'margin': fields.function(_product_margin, method=True, string='Margin', store={}),
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'margin': fields.function(_product_margin, method=True, string='Margin', store=True),
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'purchase_price': fields.float('Cost Price', digits=(16,2))
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}
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