This study seeks to measure the costs associated with HIV prevention service delivery to female sex workers (FSW) in Nigeria, as well as examine the relationship between management practices at the community-based organizations (CBOs) and costs. To complete these goals, the study will collect both retrospective and prospective data from CBOs and from centralized information from study partners (Society for Family Health, SFH). In the prospective section of the study, CBOs will be sampled and assigned to either treatment or control groups. Data collected at the CBOs will be aggregated by the CBO managers, and those in the treatment group will receive feedback on their performance on a monthly basis. Those in the treatment group will additionally receive a management training to guide their management practices. Researchers hypothesize that there will be improvements in management indicators and therefore decreases in costs at CBOs in the treatment group. Results will be disseminated to local, national, and international stakeholders.