Gaines Company computes depreciation using the composite method. A schedule of Gaines Companys machinery is presented below: Total Cost Estimated Salvage Value Estimated Life in Years Machine A $700000 $50000 13 Machine B 500000 50000 10 Machine C 300000 20000 7 The composite life (in years) for these assets is 10.7 years. 10.0 years. 9.0 years. 10.2 years