Final answer:
Ryan's implicit costs are $80 per day, which is derived by subtracting his daily explicit costs from his total daily revenue, under the condition that his economic profit is zero.
Step-by-step explanation:
The economic profit of a business is calculated by subtracting both explicit and implicit costs from total revenues. In this scenario, Ryan has zero economic profits, which means his total revenues ($200 per day) are equal to the sum of his explicit costs ($120 per day) and implicit costs. To find the value of Ryan's implicit costs, we follow the formula:
Economic profit = Total revenues - Explicit costs - Implicit costs
Since Ryan's economic profit is zero, we can rearrange the formula to solve for implicit costs:
0 = $200 - $120 - Implicit costs
Implicit costs = $200 - $120
Implicit costs = $80
Therefore, the value of Ryan's implicit costs must be $80 per day.