Final answer:
The activity variance for wages and salaries in October is calculated as the difference between the actual cost of $26,470 and the planned cost at the actual activity level of 101 births, which is $25,470, resulting in an activity variance of $1,000.
Step-by-step explanation:
The question is asking to calculate the activity variance for wages and salaries in October. The formula for calculating the activity variance is to take the difference between the actual cost and the planned cost at the actual level of activity. To compute the planned cost at the actual level of activity (101 births), you apply the cost formula given, which is $1,230 per month plus $240 per birth. Therefore, the planned cost for 101 births is $1,230 + ($240 × 101) = $25,470.
The actual cost is given as $26,470. The activity variance is then the actual cost minus the planned cost at the actual activity level. The calculation is $26,470 (actual cost) - $25,470 (planned cost for 101 births) = $1,000. Thus, the activity variance for wages and salaries in October would be $1,000.