J&J have 40 staff. 30 are paid $29 an hour and others are fixed salary staff with $7,500 paid monthly. What is the total cost of personnel?

The cost of a pen includes $30 for the glass, $75 for the wooden frame, and $80 for assembly. The assembly desk and tools cost $5000. Two hundred fifty frames are expected to be produced in the coming year. What cost function best represents these costs?

Using cost function Y = a + bX, If Y = $75,000, a = $30,000, and X = 2,500, what is b?

For the linear equation of Y = a + bX, X is known as?

level of activity	total cost	units of activity
highest	28000	15000
lowest	22000	10000
diff	6000	5000