I did:

(total output / Operating time) / Ideal run rate

for efficiency rate and multiplied the 3 values for overall equipment effectiveness. Please show what I did wrong.

Jefferson Company's demand for its only product exceeds its manufacturing capacity. The company provided the following information for the machine whose limited capacity is prohibiting the company from producing and selling additional units. Actual run time this week Machine time available per week Actual run rate this week Ideal run rate Defect-free output this week Total output this week (including defects) 6,106 minutes 7,100 minutes 7.70 units per minute 10.00 units per minute 12,141 units 17,100 units Required: 1. Compute the utilization rate. (Round your answer to 2 decimal places.) 2. Compute the efficiency rate. (Round your answer to 2 decimal places.) 3. Compute the quality rate. (Round your answer to 2 decimal places.) 4. Compute the overall equipment effectiveness (OEE). (Do not round intermediate calculations. Round your final answer to 3 decimal places.) Answer is complete but not entirely correct. 0.86 Utilization rate Efficiency rate Quality rate Overall equipment effectiveness 0.28 X 0.71 0.171 X