The following information was taken from the annual manufacturing overhead cost budget of Shamrock Compary: During the year, 4,100 units were produced, 16,700 hours were worhd, and the actual manufacturing overhead was $62,980. Actual fixed manufacturing overhead costs equalled the budgeted fived manufacturing overhead costs. Overhead is applied based on direct labourhours. (a) Calculate the total, fixed, and variable predetermined manufacturing overhead rates. (Round answers to 2 decimal places, es 15.25.) Calculate the total, budget, and volume overhead variances