4. On April 1, 2021, KAKAYANIN Company had 6,000 units of Work in Process in Department B, the second and last stage of their production cycle. The costs attached to these 6,000 units were Php 12,000 of cost transferred in from Department A, Php 2,500 of material cost added in Department B and Php 2,000 conversion cost added in Department B. Materials are added in the beginning of the process in Department B. Conversion was 50% complete on April 1, 2021. During April 14,000 units were transferred in from Department A at a cost of Php 27,000, and material cost of Php 3,500 and conversion cost of Php 3,000 were added in Department B. On April 30, Department Bhad 5,000 units of work in process 60% incomplete as to conversion costs. The costs attached to these 5,000 units were Php 10,500 of cost transferred in from Department A, Php 1,800 of material cost added in Department B and Php 800 of conversion costs added in Department B. a. Using weighted average method, what is the unit cost per transferred-in? b. Using weighted average method, what is the unit cost per materials ? c. Using weighted average method, what is the unit cost per conversion costs