job costing batch costing problem solved in class

the following information relates to job 2468. which is being carried out as per order.
item                                                department A                department B
DIRECT MATERIAL                       5000                              3000
DIRECT LABOR HOURS                  400                                200
RATE PER LABOR HOUR                   4                                    5
PRODUCTION OVERHEAD                4                                   4
(per direct labor  hour)
selling, admn , other overheads        20% of full production cost
profit margin                                     25% of sales price
find the sales price and profit.
SOLUTION:
DM (5000+3000)                            8000
DL (400*4 + 200*5)                        2600
PRN OH (400+200)*4                     2400
___________________________________
PRODUCTION COST                   13000
SLG,ADM,OTHER OVERHEAD
(13000*20%)                                    2600
____________________________________
TOTAL COST                                 15600
SELLING PRICE(15600*100/75)    20800
____________________________________
PROFIT                                            5200
+++++++++++++++++++++++++++++++++++++++++++++++++
Problem 2:
a company has a job x112. the details are
DM  1350
DL     150 hours
DL / HR  6/HR
Variable OH  2/ labor hour
Fixed OH       3/ labor hour
find out :
what is the selling price if margin is 25%
what is the selling price if markup is 25%.
solution:
DM                            1350
DL (150x6)                  900
prn OH(150x5)             750
______________________
Prn cost                  3000
___________________
selling price at margin 25% (3000*100/75)       = 4000
selling price at mark up 25% (3000*125/100)  = 3750

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batch costing problem:
production is in batches. a batch is a cost unit which consists of a separate, readily identifiable group of product units. which maintains its separate identity thorughout the production process.
the procedure is very similar to job costing.
each batch is treated as a job and costs are calculated for total batch.
on completion cost per unit is found.
cost per unit = batch cost / units in batch
.
problem:
AP ltd manufactures ring binders which are embossed with the customers own logo. a customer has ordered a batch of 300 binders. the following is a typical batch of 100 binders cost sheet.
DM                               30
DL                                 10
MACHINE SETUP        3
DESIGN ART WORK  15
_____________________
PRIME COST                58
_________________________
DIRECT employees are paid on a piece work basis.
production overheads are absorbed at a rate of 20% of direct wages cost. , 5% is added to the total production cost of the batch to allow for selling , distribution and admin overheads.
the company requires a profit margin of 25% of sale value.
find out the selling price of 300 binders.
solution:

PRIME COST (58*3)                         174
overheads (10*3*20%)                             6
______________________________________
  production cost                                     180
selling distrib admn oh (5% of 180)             9
___________________________________
total cost                                              189
selling price after margin (189*100/75)  252
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