costs	sales
4.000000000E+01	3.850000000E+02
2.000000000E+01	4.000000000E+02
2.500000000E+01	3.950000000E+02
2.000000000E+01	3.650000000E+02
3.000000000E+01	4.750000000E+02
5.000000000E+01	4.400000000E+02
4.000000000E+01	4.900000000E+02
2.000000000E+01	4.200000000E+02
5.000000000E+01	5.600000000E+02
4.000000000E+01	5.250000000E+02
2.500000000E+01	4.800000000E+02
5.000000000E+01	5.100000000E+02