How do I create production cost report using the weighted average?

A Company manufactures small boats. Materials are added at the beginning of the process and conversion costs are incurred evenly throughout the process. Data for April follows: 2 4 6 8 11 Production data Units in process, April 1 Units started into production Units in process, April 30 Cost Data Work in process, April 1: Materials Labour Manufacturing overhead Units $25,500 3, 000 Percent Complete Costs added: Materials Labour Manufacturing overhead $90,000