Erie company manufactures a mobile fitness device called the jogging mate. the company uses standards to control its costs. the labor standards that have been set for one jogging mate are as follows:
standard hours standard rate per hour standard cost
27 minutes $6.00 $2.70
during august, 9,220 hours of direct labor time were needed to make 19,200 units of the jogging mate. the direct labor cost totaled $54,398 for the month.
required: 1. what is the standard labor-hours allowed (sh) to makes 19,200 jogging mates? 2. what is the standard labor cost allowed (sh × sr) to make 19,200 jogging mates? 3. what is the labor spending variance? 4. what is the labor rate variance and the labor efficiency variance?

Stocks a, b, and c are similar in some respects: each has an expected return of 10% and a standard deviation of 25%. stocks a and b have returns that are independent of one another; i.e., their correlation coefficient, r, equals zero. stocks a and c have returns that are negatively correlated with one another; i.e., r is less than 0. portfolio ab is a portfolio with half of its money invested in stock a and half in stock b. portfolio ac is a portfolio with half of its money invested in stock a and half invested in stock c. which of the following statements is correct? a. portfolio ab has a standard deviation that is greater than 25%.b. portfolio ac has an expected return that is less than 10%.c. portfolio ac has a standard deviation that is less than 25%.d. portfolio ab has a standard deviation that is equal to 25%.e. portfolio ac has an expected return that is greater than 25%.