hello, i would be very grateful if anyone could help me out with this question. i have done it and keep getting odd numbers and would really appreciate some expert insight.

The total expected direct labor hours for the current year was 500 hours for a total cost of $6000. The estimated the total manufacturing overhead was $21,000. The employee used the $21,000 figure but thought the number could be as low as $15,000 or as high as $30,000. Direct materials and direct labor figures for the two products appear below: Black Goop Direct materials Direct labor (0.05 hours per one kilo package) 4.50$ 0.60$ Slippery Strings 4.00$ 0.60$ Activity cost pool, activity measure Expected activity for the year Expected cost for the year ($) 50 3000 90 Purchasing, purchase orders Material handling, number of set-ups Quality control, number of batches Mixing, mixing time in hours per kilo Cutting, cutting time in hours per kilo 7000 6500 200 500 7000 3400 2000 Data regarding the coming year's expected production of Black Goop and Slippery Strings are presented below. There is no raw materials inventory for either product at the start of the year. Note that Black Goop does not have a cutting operation and Slippery Strings does not have a mixing operation. Black Goop Slippery Strings Expected sales Batch size Setups Purchase order size Mixing time per kilo Cutting time per kilo 8000 kilos 1000 kilos 3 per batch 2000 kilos 5 mixing hours 200 kilos 100 kilos 2 per batch 100 kilos 2 cutting hours In order to set a selling price, the company typically takes the product cost per unit and marks it up by 85% Required: 1. Using direct labor-hours as the base for assigning manufacturing overhead cost to products, do the following: A. Find the predetermined overhead rate that will be used during the year B. Determine the unit product cost of one pound of Black Goop and Slippery Strings C. Determine the total amount of manufacturing overhead cost assigned to Black Goop and to Slippery Strings for the year D. Determine the final selling price for both products