What is the customer margin under activity-based costing when the number of orders increases to 15 ? (Enter a loss as a negative mount.) (a) Based on new number of orders in Requirement 2, what is the customer margin under activity-based costing when the data are corrected? (Enter a loss as a negotive omount) What is the customer margin under activity-based costing when the number of orders increases to 15 ? (Enter a loss as a negative mount.) (a) Based on new number of orders in Requirement 2, what is the customer margin under activity-based costing when the data are corrected? (Enter a loss as a negotive omount)