Suppose that hiring a third worker at the campus coffee shop increases sales from $115 per hour to $130 per hour. What is the marginal product of labor per hour from adding that third worker

$15 per hour

Explanation:

The marginal product of labor in this instance is the increase in total sales as a result of one additional worker being hired:

= Change in sales/ change in number of workers

= (130 - 115) / 1

= 15/1

= $15 per hour

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"we first find value of tax in dollars.

the difference between the two prices   is: 23. 54 - 22 = 1.54

therefore the sales tax in dollars is 1.54

the tax % will be   (amount of tax / original cost price ) × 100

(1.54 / 22) × 100  → (0.07) × 100 =   7

so the tax rate is 7%

we can double check the answer.

7 % of 22   → (7/100) × 22 → 0.07 × 22 = 1.54

22 + 1.54 = 23.54"