   
                             1    20  21       300                                2    4  5       315                          2    19  18 20       330                            3    5  6       245                                       3    20  21        0                                               4    4  5.6       15                          4    20  21       30                         5    5  6       45                    5    21  22       60                        6    5  6 .7       75                         6    21  22       90                     
                   7    7  8       105                         7    23  24       120                               8    7  8       135                         8    23  22.21       150                         9    8  7 . 9       165                          9    23  22 .24       180      
                 10    8  9       195                         10    23  24       210                          11    7  8       225                              11    21  22       240                         12    7  8       255                                    12    22  21 .23       270                                       1    6  7       285                      