For the question below, I'm having trouble learning how to use the T-tables to get answer in the B section. I have to learn to use those. Since this is a small sample size, we are required to use the T-table on section B of the following question. I think I have Section A, but I need help with section B so I will know how to do. Feel free to solve both sections, as long as the answers in section B (i & ii) are done using T-tables.

Here is the question:

Ellsworth Company has signed a contract that requires them to produce and sell 50,000 units for $8 per unit. A regression model was run using 27 observations to measure total costs as a function of units. It is as follows:

Total costs = $90,000 + $6 per unit The standard error of the estimate is $4,000. Required: a. Calculate the following assuming certainty: i. Breakeven in units and dollars ii. Sales quantity needed to obtain an after-tax profit of $24,000. Assume that a 40 percent tax rate is used for only part ii. iii. Sales in dollars needed to obtain a pretax profit equal to 10 percent of sales. b. Calculate the following assuming uncertainty: i. What is the range of incomes that would be expected with 90 percent confidence? ii. What is the probability that the firm will make a profit next year