The following data are taken from the production records at Plant #2 of GP Industries for March. Work-in-process beginning inventory consisted of 10,000 units fully complete with respect to materials and 30 percent complete with respect to conversion costs. In March, the plant started 80,000 units and transferred out 70,000 units. The work-in-process ending inventory was fully complete with respect to materials and 70 percent complete with respect to conversion costs.

GP Industries uses weighted-average process costing at Plant #2 for product costing.

Required
The following equivalent units (materials; conversion) used to compute production costs for March, would be:
a. (90,000; 81,000)
b. (80,000; 84,000)
c. (90,000; 84,000)
d. (80,000; 81,000)
e. (100,000; 87,000)