Use excel sheet to solve the question below:

Year on year depreciation is $200\%.($Y$1=14\mathrm{.}29,$ Yr $2=24\mathrm{.}49,$ Yr $3=17\mathrm{.}49,$ Yr $4=12\mathrm{.}49,$ Yr $5=8\mathrm{.}93,$ Yr $6=8\mathrm{.}92,$ Yr $7=8\mathrm{.}83,$ Yr $8=4\mathrm{.}46)$