How would you approach this question on excel: The fund actually incurs transaction cost whenever it rebalances. Each time the fund rebalances its portfolio, it pays a fixed cost of 2 bps of its total assets and a variable cost of 25 bps of total trading volume (i.e., the sum of buys and sells). Jeff is concerned about the transaction costs and would like you to conduct a cost analysis of the current rebalancing policy under the proposed asset allocation. The fund currently rebalances towards its target asset allocation every month. Does rebalancing monthly cost too much? Would you recommend a quarterly rebalancing, annual rebalancing, or other rebalancing strategy