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Cold calls
| No. of working days/year | 250 | days |
| Working hours/day | 7.5 | hours |
| Total working hours/year | 1875 | hours |
| No. of purchase areas for office | 100 | areas |
| No. of potential suppliers for each area | 100 | suppliers |
| Average length of cold call (hours) | 0.1 | hours |
| Calls from each supplier/year | 2 | |
| Total potential call time/year | 2000 | hours |
| Actual time in year I would spend working if I took every call | -125 | hours |