Buy Bank had $130 million in assets and $20 million in expenses before the acquisition of Sell

Question:

Buy Bank had $130 million in assets and $20 million in expenses before the acquisition of Sell Bank, which had assets of $50 million and expenses of $10 million. After the merger, the bank had $180 million in assets and $35 million in costs. Did this acquisition generate either economies of scale or economies of scope for Buy Bank?