1. Trình bày các phép biến đổi sơ cấp trên ma trận và nêu ví dụ minh hoạ cụ thể cho từng phép biến đổi?

Wallis company manufactures only one product and uses a standard cost system. the company uses a predetermined plantwide overhead rate that relies on direct labor-hours as the allocation base. all of the company's manufacturing overhead costs are fixed—it does not incur any variable manufacturing overhead costs. the predetermined overhead rate is based on a cost formula that estimated $2,886,000 of fixed manufacturing overhead for an estimated allocation base of 288,600 direct labor-hours. wallis does not maintain any beginning or ending work in process inventory.

Thomas kratzer is the purchasing manager for the headquarters of a large insurance company chain with a central inventory operation. thomas's fastest-moving inventory item has a demand of 6,000 units per year. the cost of each unit is $100, and the inventory carrying cost is $10 per unit per year. the average ordering cost is $30 per order. it takes about 5 days for an order to arrive, and the demand for 1 week is 120 units. (this is a corporate operation, and the are 250 working days per year.)a) what is the eoq? b) what is the average inventory if the eoq is used? c) what is the optimal number of orders per year? d) what is the optimal number of days in between any two orders? e) what is the annual cost of ordering and holding inventory? f) what is the total annual inventory cost, including cost of the 6,000 units?

crow design, inc. is a web site design and consulting firm. the firm uses a job order costing system in which each client is a different job. crow design assigns direct labor, licensing costs, and travel costs directly to each job. it allocates indirect costs to jobs based on a predetermined overhead allocation rate, computed as a percentage of direct labor costs. direct labor hours (professional) 6,250 hours direct labor costs ($1,800,000 support staff salaries ,000 computer ,000 office ,000 office ,000 in november 2012, crow design served several clients. records for two clients appear here: delicious treats mesilla chocolates direct labor 700 hours 100 hours software licensing $ 4,000 $400 travel costs 8,000 1. compute crow design’s direct labor rate and its predetermined indirect cost allocation rate for 2012. 2. compute the total cost of each job. 3. if simone wants to earn profits equal to 50% of service revenue, how much (what fee) should she charge each of these two clients? 4. why does crow design assign costs to jobs?