Lifang Wu owns an automated machine shop that makes precision auto parts. He has just compiled an input–output report for the grinding work center. Complete this report and analyze the results.

Input–Output Report PERIOD 1 2 3 4 TOTAL Planned input 80 80 100 100 Actual input 85 85 85 85 Deviation Planned output 90 90 90 90 Actual output 85 85 80 80 Deviation Initial backlog: 30