We expect that a bond yield will shortly drop by $0,25\%.$ The bond sensitivity is $5\%,$ the YTM is $4,25\%$ and its dirty price $98\%.$ How much $($SAR$)$ we should pay for the investment $($effective value$)$ if we want to have a $100\mathrm{.}000$ SAR for that $0,10\%$ YTM decrease?