Transcribed image text: Siu Lek Yuen (SLY) is a company specializes in producing one surgical mask product known as HappyWear. Each carton of HappyWear is budgeted to sell at $3,750. The company adopts a standard costing system in its operations. The following is the standard cost to produce one carton of HappyWear: Cost per Unit (S) Direct materials $30 per roll 2,400 Direct labour $80 per hour 232 Factory overhead": Variable 375 Fixed 225 Factory overhead is allocated based on machine hours and 7.5 machine hours is expected to be used to produce one carton of Happy Wear. The predetermined overhead rates for the month are developed based on a production capacity of 2,500 cartons. There are three managers in SLY: the merchandising manager, Yannie Lam, who is responsible for sourcing of materials, the production manager, Stephen Ho, who is responsible for the entire manufacturing operations and the sales manager, Wendy Cheung, who is responsible for the sales and marketing of HappyWear. During the month of November, Yannie has decided to change the materials purchase to a new supplier. However, the workers complained that the materials from the new supplier yield a lot of waste due to impurities. The factory workers in SLY are very experienced in the production process. You have obtained the following information for the month of November based on the production of 2,625 cartons: Direct materials purchased 225,000 rolls @ $29.60 per roll Direct materials used 215.100 rolls Direct labour $612,250 for 7,750 hours Variable overhead $1,093.750 Fixed overhead $570,000 Machine hours used 20,000 hours Total sales $9.646.875 SLY has no beginning raw materials and finished goods inventory. Also, there is no finished good inventory at the end of November. Required: (a) Determine the following variances: (1) direct materials price and quantity variances; (4 marks) (ii) direct labour rate and efficiency variances: (3 marks) (ii) variable overhead rate and efficiency variances, (3 marks) (iv) fixed overhead budget and volume variances; and (4 marks) (v) sales price and sales volume variances. (3 marks) (b) Discuss why price and quantity variances for direct materials, direct labour and variable overhead are separately computed. (2 marks) (C) Based on the variances computed in item (a) above and the information from the question, critically evaluate the performance of Yannie, Stephen and Wendy. (6 marks)