Ex$.15-25$: Graphical Analysis$--$Variable Overhead Cost Variances

You are in charge of making a presentation to operating managers regarding the mearing of the total overhead variance that appears each month on their performance reports. The controller suggested that a graphical presentation might be an effective way to communicate the essential points to your audience. As such, she provided you with the following partially completed graph. This graph represents a situation where $(1)$ machine hours are used to apply variable overhead costs to products, and $(2)$ there is both an unfavorable variable overhead spending variance and an unfavorable variable overhead efficiency variance. The controller also indicate that she would like you to use the following notation for some of the items to be included in your chart: actual number of machine hours worked during the period $=AQ$; standard number of machine hours allowed for the output of the period $=$ SQ; actual variable overhead cost per machine hour worked during the period $=$ AP: and, standard variable overhead cost per machine hour $=SP.$

Based on the preceding assumptions and information, properly label the components of the above graph.