Exercise 04-4 Computing overhead rates under ABC LO P3 Xie Company identified the following activities, costs, and activity drivers for this year. The company manufactures two types of go-karts: Deluxe and Basic. Activity Expected Costs Expected Activity Handling materials $ 625,000 100,000 parts Inspecting product 900,000 1,500 batches Processing purchase orders 105,000 700 orders Paying suppliers 175,000 500 invoices Insuring the factory 300,000 40,000 square feet Designing packaging 75,000 2 models Required: Compute the activity rate for each activity, assuming the company uses activity-based costing. (Round activity rate answers to 2 decimal places.)

Answer and Explanation:

The computation of the activity rate for each activity is shown below:-

                      a                         b                             c   = a ÷ b

Particulars Expected Cost     Activity driver          Activity rate

Handling

material     $625,000              100,000                 $6.25 per part

Inspecting

product     $900,000                1,500                      $600 per batch

Processing

orders        $105,000                   700                        $150 per order

Paying

Supplies    $175,000                    500                       $350 per invoice

Insuring

factory       $300,000                   40,000                   $7.50 per sqft

Designing

packaging  $75,000                        2                         $37,500 per model

Total           $2,180,000

We simply divide the expected cost by the activity driver in order to find out the activity rate

sound is invisible, but sometimes we can feel it. when a kettle-drum is thumped with a stick that time the tight drum skin moving up and down very quickly for some time and then it pumped sound waves into the air. loudspeakers also work in a similar manner.

components of a speaker:

electromagnet

in order to translate an electrical signal into an audible sound, an electromagnet is used in looudspeakers

  suspension

suspension is used to   center the voice coil in the gap of the magnet and it exerts a restoring force to keep it there. suspension is used to limits the maximum mechanical excursion of the diaphragm and voice coil.

voice coil

voice coil is a coil of wire which is attached to the apex of a loudspeaker cone. it provides the motive force to the cone by the reaction of a magnetic field to the current passing through it.

cone

in a   loudspeaker, a   thin, semi-rigid membrane attached to the voice coil, which moves in a magnetic gap due to which it vibrates   and produced sound. it is known as diaphragm and it can also be called a cone, though not all speaker diaphragms are cone-shaped.

surround

surround is also known as front suspension. surround is used to join the cone to the chassis. together with the suspension it controls the cone excursion, and it is also used to   determine how energy which is   travelling through the cone is absorbed, and how the speaker limits when it reaches the ends of its travel.

dustcap

dustcap is used to protect the voice coil from dust and dirt. it is a part of the cone.

how speaker work

the outer part of the cone is fastened to the outer part of the loudspeaker's circular metal rim. the inner part is fixed to   voice coil that sits just in front of a permanent magnet . when loudspeaker is hooked up to a stereo, electrical signals feed through the speaker cables into the coil. it will convert the coil into an electromagnet magnet . when electricity flows back and forth in the cables, the electromagnet either repels or attract the permanent magnet. this moves the coil back and forth, and it pull and push the loudspeaker cone. like a drum skin vibrating back and forth, the moving cone pumps sounds out into the air.in this way loudspeakers works.