F2 mock exam

Hello sir.. all these question I can’t do it and i hope you can help me.
Q1: A firm manufactures a product in batches of 2500. output is classified as premium quality, standard quality or reject. The following probabilities have been calculated for the outputs:
Grade:
Premium : has probability of 0.5
Standard : has probability of 0.4
So how many rejected products are expected from each batch?

Q2: A company is considering a new one year contract which will require three skilled employees. the employees could be recruited for the duration of the contract at a total cost of $90,000. They would require supervision by an existing manager who costs $40,000 per year and it is anticipated that this contract would need 20% of the manager’s time. Another option is that the company could retain existing employees who currently each earn $20,000 per year, at a total training cost of $10,000. The total replacement cost of these employee. If they were used on the new contract. would be $75,000.
What is the total relevant labor cost for this contract?

Q3: A company has a margin of safety ratio of 20%. Budget sales in a period are $480,000 and budgeted variable costs are 45% of sale revenue. What are the budget fixed costs?
Q4: A business sell a single product for $85 per unit. Variable costs per unit are $53 and total annual fixed cost are $30,000. The business has a margin of safety of 1,750 units. What is the budgeted annual sales revenue for the business?
Q5: Output and costs in a factory over three periods are summarised below.

output(units):
Period 1:11640 , Period 2: 12410 , Period 3: 12260
cost($), period 1: 336548 , Period 2: 348252 , Period 3: 345942
Using high/low method, what are the estimated fixed costs per period?

Really sorry teacher for bother you with so many question, and I hope you can help me 🙂 Thanks you before hand…