Please see the attachment for all questions. Please show all of your work.

Problem 1 - Make or Buy Walters Industries manufactures a product which contains part XYZ. The company has always purchased this part from a supplier for $70 each. Walters recently upgraded its own manufacturing capabilities and now has enough excess capacity (including trained workers) to begin manufacturing the part instead of buying it. The company prepared the following per unit cost projections of making the part, assuming that overhead is allocated to the part at the normal predetermined overhead rate of 60% of direct labor cost. The required volume of output to produce the parts will not require any incremental fixed overhead. Incremental variable overhead cost is $4.50 per part. Should Walters make or buy the parts? Problem 2 - Sell or Rework A company has 33,000 units of its sole product that it produced last year at a cost of $71 each. This year's model is superior to last year's and the 33,000 units cannot be sold for their regular selling price of $127 each. The company has two alternatives for these items: (1) they can be sold to a wholesaler for $45 each, or (2) they can be reworked at a total cost of $700,000 and then sold for $53 each. The company has enough idle capacity to rework these items without affecting any new production. Which choice would increase the company's profits the most? Problem 3 - Sell or Process Further A company has already incurred an $81,000 cost in partially producing its three products. Their selling prices when partially and fully processed are shown in the table below with the additional costs necessary to finish their processing. Based on this information, should any products be processed further? Problem 4 Atlantic Hot Tub Company actually produced 300 units of product during June of 2000, which are 20 units higher than the anticipated static budget of 280 units. The Company gathered the following information: Standard price/unit of input Actual price/unit of input Standard input allowed/unit of output Actual units of input Direct Materials $40/lb. $37/lb. 4 lbs. 1,100 lbs. Direct Labor $8.00/hr. $8.50/hr. 3 hrs. 890 hrs. Other information gathered was: Predetermined variable overhead rate was $2.00 per direct labor hour (actual variable overhead is $2,000). Predetermined fixed overhead rate was $4.00 per direct labor hour (actual fixed overhead is $3,500). Required: Compute the following. a. Direct materials price variance b. Direct materials quantity variance c. Direct labor rate variance d. Direct labor efficiency variance e. Variable overhead spending variance f. Variable overhead efficiency variance g. Fixed overhead spending variance h. Fixed overhead volume variance