x,y,sum
1,1,2
4,4,8
6,6,12
10,10,20
30,30,60
23,43,66
55,80,135
100,22,122
23,45,68
56,78,134
13,78,91
300,34,334
12.5,56.7,69.2
23.6,89.3,112.9
67.8,87.9,155.7
200,700,900
203.6,67.9,271.5
400,45.7,445.7
34.6,56.9,91.5
400.5,356,756.5
45.7,123.7,169.4
1000,3456,4456