We are looking to do a 12 month introductory rate: Tier 1 1.75% APY for up to $250,000, Tier 2 at 1.35% APY for $250,000+. After the 12 month intro period, it would drop down to our base rates (I already have these calculated). I am having issues getting the proper rates to disclose for the introductory period. For Tier 1, the rate would be 1.74%, but I am having difficulty with Tier 2 since it would be a blended rate. Any insight would be appreciated.