help me please

help me , please

Cao Trang uses a process-cost system for its single product. Material A is added at the beginning of the process; in contrast, material B is added uniformly to production requirement. The firm's ending work-in-process inventory consists of 4,000 units that are 75% complete. Required: What is the equivalent units of production with respect to materials A and B in the ending work-in-process inventory