Given the following data on planned and actual inputs and outputs of work center 4 of a tool and die shop in terms of standard hours of work, determine the cumulative deviation and the backlog for each period. The beginning backlog is 15 standard hours of work:

2 3 Week 4 in 70 Planned input Actual input 60 55 65 60 55 70 65 70 45 Planned output Actual output 55 65 70 70 60 55 55 60 65 70