i have this import
<product>
<id>8810</id>
<category>ΧΑΛΙΑ>ΧΕΙΜΕΡΙΝΑ ΧΑΛΙΑ>Μοντέρνα χαλιά</category>
<mpn>2021962401023</mpn>
<RegularPrice>239.00</RegularPrice>
<SalePrice>191.20</SalePrice>
<StockStatus>instock</StockStatus>
<Stock>1</Stock>
</product>
i want to enable override = 1 when the SalePrice has a value
i attach my template to see what i have done so far
when the saleprice field is empty is like this: <SalePrice/>
thanks in advanced