Final answer:
To forecast July sales for National Scan, Inc., the sales data from April (328 units), May (331 units), and June (334 units) are averaged together, resulting in a three-month moving average forecast of 331 units for July.
Step-by-step explanation:
The correct option : may
The forecast for July sales volume using a three-month moving average is calculated by averaging the sales units from April, May, and June. The sales volumes for these months are:
We then calculate the average of these three months:
(328 + 331 + 334) / 3 = 993 / 3 = 331 units
Therefore, the forecast for July using the three-month moving average is 331 units.