Consider a manufacturer that makes a certain product. Variable manufacturing overhead and fixed manufacturing overhead are allocated to each unit made based on budgeted direct labour-hours. The following are the production data. (There were no beginning or ending inventories.) Required: 1-a. Calculate the direct labour-hours management will have expected to incur in light of the production volume achieved. 1-b. Which amount is relevant for determining labour efficiency variance? 2. Calculate all the variable overhead variances. (Indicate the effect of each variance by selecting "F" for favourable, "U" for unfavourable, and "None" for no effect (i.e., zero variance).) 3. Calculate all the fixed overhead variances. (Indicate the effect of each variance by selecting "F" for favourable, "U" for unfavourable, and "None" for no effect (i.e., zero variance).)