Skoda Company makes metal signs for business and residences. These signs are made of sheet metal, which the owner paints by hand. The owner is concerned that he does not have a good measure os support costs for the signs. Currently, he predicts support costs to be 30 % of the cost materials. Close investigation of the business reveals that $10 per direct labor hour is a more plausible and reliable support cost measure.

Skoda Company has the following information available:

Small Sign Larger sign

Materials cost $300 $700

Direct labor hours 5 11

1. Using cost of materials as the cost driver, what amount of support costs is assigned to the Small sign?

2. Using cost of materials as the cost driver, what amount of support costs is assigned to the Larger sign?

3. Using direct labor hours as the cost driver, what amount of support costs is assigned to the Small sign?

4. Using direct labor hours as the cost driver, what amount of support costs is assigned to the Larger sing?

For the first : support coast for Small sign do I solve like this

30% (300+ 700) = .3x1000=300

or do I have to use Y=F+VX formula? or which formulas I may use to solve this problem?