This document discusses the program experience approach to costing nutrition programs. It involves estimating costs based on actual programs that have been implemented rather than hypothetical programs. The key points made are: - It estimates the cost of what is currently being delivered based on total program expenditures and the number of people served to determine a unit cost. - Cost data comes from program budgets and expenditure reports from implementing agencies, donors, and academics. - Advantages are that costs reflect real-world inefficiencies and are a reasonable approximation of future costs. - Challenges include needing quality unit cost data, which requires an initial data collection effort that may be lengthy since programs need to already exist. - An