Fast Wire Incorporated manufactures a scrambling device for cellular phones. The main component of the scrambling device is a very delicate partDTV-12. DTV-12 requires careful handlings during manufacturing. Once damaged, the part must be discarded. Only skilled laborers are hired to manufacture and install DTV-12. Damages still occur, however. The following are the operating data of Fast Wire Incorporated for 2021 and 2022 relative to the insertion of DTV-12.

	2021	2022
Number of phones manufactured	652,500	785,400
Units of DTV-12 used	962,700	1,077,000
Direct labor hours for DTV-12 insertion	2,250	3,095
Total cost of DTV-12 units	$ 1,446,000	$ 2,336,000
Direct labor wage rate per hour	$ 80.50	$ 100

The partial direct labor operational productivity ratio for 2021 is:

Multiple Choice

219 units per DLH.

126 units per DLH.

385 units per DLH.

257 units per DLH.

290 units per DLH.