Which of the Eggo$$ waffle variances would be impacted by the drop in the price of eggs?

Would the drop in the price of eggs cause a favorable or unfavorable variance for Kellogg$$s$?$ Create an example using numbers to explain.

What is Kellogg$$s likely to do to its standard$($s$)$ based on the current price of eggs? Which standard$($s$)$ would be impacted?

How does variance analysis help in continuous improvement?