Где там математика по камням?)
Total possible [Contract Bounties] is 4825.
Total cost of clearing Cross-Season store items is 2020 [Contract Bounties] (2320 if you need the Amiya Newsgirl Skin)
Total cost of clearing the Season #0 store is 3075 [Contract Bounties]
Total cost of clearing both stores is 5095. Total cost of clearing current event store + Bibeak and max Potential Tokens = 4095
Thus, there is not enough currency to clear both the current event and cross-seasonal shop, but there is enough to clear the current event store + max Potential Bibeak.