Answer:
Roan Paper Co.
Mixing Department
Production Cost Report for March:
                                    Direct         Direct     Manufacturing    Total Costs
                                   Materials     Labor      O/h Allocated
Beginning  inventory    $350         $245        $200                  $795
Costs added  during
   March                       4,940        3,000       3,225                  11,165
Total costs               $5,290      $3,245     $3,425               $11,960
less Ending inventory  $115            $71           $74                   $260
Cost of production  $5,175       $3,174      $3,351                $11,700
2. General Journal:
Date    Description                       Debit          Credit
March
Cost of production                     $11,700
Direct Materials                                               $5,175
Direct Labor                                                    $3,174
Manufacturing overhead                               $3,351
To record the cost of production for march.
Direct Materials costs             $5,175
Direct Labor costs                   $3,174
Manufacturing overhead        $3,351
Cash Account                                                $8,526
Wages Payable                                              $3,174
To record costs of materials, labor and overhead.
Explanation:
a) Data and Calculations for March:
                                    Direct        Direct     Manufacturing      Total Costs
                                   Materials     Labor      O/h Allocated
Beginning  inventory  $350         $245          $200                   $795
Costs added  during
   March                     4,940        3,000          3,225                   11,165
Total costs             $5,290      $3,245        $3,425                $11,960
Total units = 5,000 ( Beginning = 300, March started = 4,200 and Ending = 500 units)
Beginning inventory of 300 and started and completed, 4,200 were 100% complete = 4,500
Ending inventory of 500 were 20% complete = 100 units.
b) Calculation of Equivalent units:
                                    Direct        Direct     Manufacturing      Total Costs
                                   Materials     Labor      O/h Allocated
Units completed          4,600       4,600        4,600                    4,600
Ending inventory            100            100            100                        100
Production for March 4,500        4,500        4,500                    4,500
Unit cost per 
equivalent unit              $1.15        $0.71         $0.74                     $2.60
Cost of Ending WIP       $115         $71            $74                       $260
Cost of production     $5,175       $3,174      $3,351                 $11,700     
b) Equivalent units are the units under production multiplied by their percentage of completion.  Usually, completed units have 100% completion, while work in process do not have 100% completion with respect to conversion costs, especially.  The purpose of calculating equivalent units is to determine accurate costs of units completed.
c) The weighted-average method in allocating production costs means that the beginning inventory, units started and completed in the period, and the equivalent units of ending inventory are added.  Then the costs of materials, labor, and overhead are allocated based on the average costs.