The following table displays the detail of property, plant, and equipment, which are stated at cost: At December 31, Land Buildings and equipment Central office and other network equipment 3-50 Cable, poles and conduit Leasehold improvements Work in progress Furniture, vehicles and other Less accumulated depreciation Total Questions: Lives (years) 2017 What does work in progress represent? 7-45 7-50 5-20 3-20 $ 806 28,914 145,093 47,972 8,394 6,139 9,180 2016 $ 667 27,117 136,737 45,639 7,627 5,710 8,718 246,498 232,215 157,930 147,464 $ 88,568 $ 84,751