Sunland Company computes depreciation using the composite method. A schedule of Sunland Company's machinery is presented below: Total Cost Estimated Salvage Value Estimated Life in Years Machine A $713500 $57000 13 Machine B 495000 57000 10 Machine C 300900 37000 The composite rate of depreciation (in percent) for these assets is 8.1. 8.7. 9.2. 10.1.