If on the basis, both Muktzah and non-muktzah items are placed when Shabbos begins –
- if the muktzah item is more valuable than the non-muktzah item then the basis is muktzah.
- If the non-muktzah item is more valuable then the basis is not muktzah.
Value is defined subjectively. In a similar vein, if one needs an item for Shabbos it is more valuable. Thus, by leaving a challah role on a tray with Shabbos candles when Shabbos begins, one would be allowed to move the tray.