I need help figuring out the correct answers to the interval upper values! Thank you ahead of time.

The management of Brinkley Corporation is interested in using simulation to estimate the profit per unit for a new product. The selling price for the product will be $45 per unit. Probability distributions for the purchase cost, the labor cost, and the transportation cost are estimated as follows: Procurement Cost ($) Labor Probability Cost ($) Probability Transportation Cost ($) Probability 10 0.25 20 0.10 3 0.75 11 0.45 22 0.25 5 0.25 12 0.30 24 0.35 25 0.30 a. Compute the profit per unit for the base case, worst-case, and best-case scenarios. Proft per unit for the base-case: 7 Proft per unit for the worst-case: 3 Proft per unit for the best-case: 12 b. For the labor cost setup intervals of random numbers. Interval Labor Cost Probability Lower Value Interval Upper Value 20 0.10 0.000 0.0999 22 0.25 0.1000 0.3499 24 0.35 0.3500 0.6999 25 0.30 0.7000 0.9999