lot hrs amount
 A   99  25.8
 A  152  20.5
 A  293  14.3
 A  155  23.2
 A  196  20.6
 A   53  31.1
 A  184  20.9
 A  171  20.9
 A   52  30.4
 B  376  16.3
 B  385  11.6
 B  402  11.8
 B   29  32.5
 B   76  32.0
 B  296  18.0
 B  151  24.1
 B  177  26.5
 B  209  25.8
 C  119  28.8
 C  188  22.0
 C  115  29.7
 C   88  28.9
 C   58  32.8
 C   49  32.5
 C  150  25.4
 C  107  31.7
 C  125  28.5