Cooperation Model of “Tampan”(dividing profit based on the agreement) and “Ounce” (cooperation model based on the ounce scale in the Coconut Sugar Production: The Study of Coconut Sugar Produsen in Karang BendoVillage Ponggok District Blitar Regency. josar. 2019;4(1):72-83. doi:10.35457/josar.v4i1.749