'Alter the lookups for regions and provider.
If RESTOFWORLD is not excluded, add it in.
If the payment provider is not specified, set it to the default.'

def _setup_price_lookups(self, region, provider):

    from mkt.developers.providers import ALL_PROVIDERS
    regions = []
    excluded = self.get_excluded_region_ids()
    if (region not in excluded):
        regions.append(region)
    if ((RESTOFWORLD != region) and (RESTOFWORLD.id not in excluded)):
        regions.append(RESTOFWORLD.id)
    if (not provider):
        provider = ALL_PROVIDERS[settings.DEFAULT_PAYMENT_PROVIDER].provider
    return (regions, provider)
