y=0 0<x≤2000
y=0.05X-100 2000<x≤2500
0.1X-225 2500<x≤4000
0.15x-425 4000<x≤7000
0.2x-775 7000<X≤22000
0.25x-1875 22000<x≤42000
0.3x-3975 42000<x≤62000
0.35x-7075 62000<x≤82000
0.4x-11175 82000<x≤102000
0.45x-16275 10200<x
y=0 0<x≤2000
y=0.05X-100 2000<x≤2500
0.1X-225 2500<x≤4000
0.15x-425 4000<x≤7000
0.2x-775 7000<X≤22000
0.25x-1875 22000<x≤42000
0.3x-3975 42000<x≤62000
0.35x-7075 62000<x≤82000
0.4x-11175 82000<x≤102000
0.45x-16275 10200<x
分给我啦