Social marketers must balance these considerations, and often end up charging at least a nominal fee to increase perceptions of quality and to confer a sense of "dignity" to the transaction.
The Balance and Transaction Count are based the aggregation of Transaction Amount, so they are derived measures.
余额和交易数基于交易量的聚集,所以它们是派生的测度。
3
That is, we no longer check that the final balanceof the test account is correct; we would check that function in the unit test for the Transaction object, not the AtmGui object.