= favorable effect on operating income; U = unfavorable effect on operating income.4. The total mix variance combines with the total yield variance to equal the total efficiency variance calculated in part 2. The direct materials mix variance of $880 F indicates that the actual product mix uses relatively more of less-expensive ingredients than planned. In this case, the actual mix contains more peanuts while using fewer dried cranberries, and only slightly more chocolate pieces.The direct materials yield variance of $1700 U occurs because the amount of total inputs needed (11,000 cups) exceeded the budgeted amount (10,000 cups) expected to produce 100 batches.The direct materials yield variance is significant enough to be investigated. The mix variance may be within expectations but should be monitored since it is favorable largely due to the use of fewer dried cranberries, which is considered an important element of the product’s appeal to customers.