as taken:           45500  21000  70000  28500 136500  30000
cheaper first:      21000  28500  30000  45500  70000 136500
dearer first:      136500  70000  45500  30000  28500  21000
round first:        21000  70000  30000  45500  28500 136500
qsort:              21000  28500  30000  45500  70000 136500
