just enter the total in 1a which should be same as provided by Fidelity on the 1099-DIV form at the front of your statement. I can't think of a reason to split these.
For the US Gov Obligations $ amount, if you are looking for state tax exemption on that, you need to calculate that for each fund based on their contribution to Box 1a multiplied by the % provided for each fund in the supplemental info (see Fidelity website / tax resources - likely low % for blue chip growth, high % for gov cash reserves). Those $ amounts can then be entered as a single total.
