Details determine success or failure - grouping remember beginner Power Query summary of problem-solving

In today PQ contact with the available information, the amount of tax items appear exclusively in digital format, grouping summary summation prompt an error value, error:. DataFormat.Error can not be converted to Number. For more information q. Various solutions actually less than similar PQ's search Baidu. The teacher had happened to join the "Excel Power Query exchange group" inspired, actually add that column format before the conditions are not uniform resulting in consistent error summary based on the column. Fortunately, the final test solutions. After the PQ is strongly recommended that you pre-processing data confirm the attributes of each column of data, then the relevant calculation summary.