Can someone help me to find the value of form 4562 line 17? Can someone tell me which IRS convention method to use if an item was put on service on 02/15/16?

ACCUM DEPR IN SERVICE METHOD LIFE 2/15/2016 SL 5 NET BOOK VALUE ASSET CASH REGISTER (book basis) COST 2016 BASIS DEPR 9,800.00 1,796.67 9,800.00 1,796.67 DEPR 2017 DEPR 1,960.00 1,960.00 2018 DEPR 1,960.00 1,960.00 5,716.67 4,083.33 2016 TOTAL ADDITIONS 5,716.67 4,083.33 RETAIL FIXTURES 803.57 10/12/2017 10/12/2017 SL SL 7 7 4,500.00 3,600.00 3,696.43 2,957.14 FURNITURE 642.86 160.71 128.57 289.28 2,249.28 642.86 514.29 1,157.15 3,117.15 2017 TOTAL ADDITIONS 8,100.00 1,446.43 6,653.57 - 1,796.67 TOTAL 17,900.00 7,163.10 10,736.90 ACCUM DEPR IN SERVICE METHOD LIFE 2/15/2016 SL 5 NET BOOK VALUE ASSET CASH REGISTER (book basis) COST 2016 BASIS DEPR 9,800.00 1,796.67 9,800.00 1,796.67 DEPR 2017 DEPR 1,960.00 1,960.00 2018 DEPR 1,960.00 1,960.00 5,716.67 4,083.33 2016 TOTAL ADDITIONS 5,716.67 4,083.33 RETAIL FIXTURES 803.57 10/12/2017 10/12/2017 SL SL 7 7 4,500.00 3,600.00 3,696.43 2,957.14 FURNITURE 642.86 160.71 128.57 289.28 2,249.28 642.86 514.29 1,157.15 3,117.15 2017 TOTAL ADDITIONS 8,100.00 1,446.43 6,653.57 - 1,796.67 TOTAL 17,900.00 7,163.10 10,736.90