Accounting Weighted average

A companys beginning works in process contained 200 units that were 20% complete. Those units completed and transferred to finished goods

During the period 4,300 units were started. Of the units started 4,000 were transferred to finished goods. The 300 units in ending work in process were 30% complete. Use the weighted average method, the equivalent units of production equals___________________

Need to understand the steps and how to get the answer