To many commissioners, that seemed high because it amounts to only 5.8 percent of this year's planned $3.5 billion day-to-day operating budget. But county officials said much of that spending relies on dedicated revenue streams that can only be spent on specific costs, like health care paid for with Medicaid funding through the Affordable Care Act. Excluding those costs and others that can't be avoided, like pension and debt payments, leaves only about a $2 billion pot where cuts can be made, they said.