Standard costing and variance analysis
Read Variance analysis from the following links:
https://corporatefinanceinstitute.com/resources/knowledge/accounting/variance-analysis/

(1) From the revenue variance analysis explain workings of sales mix variance , sales quanity variance and sales volume variance.
(2) Study examples of material , labour and fixed overhead variance – no submission required.
(3) Go through the video at the end of the lesson. What was the purpose of flexing the budget ( what is also called Flexible budget). It is discussed 2MINUTES ONWARDS . Explain the budget , revised budget and actuals and variance discussed in the video.