please answer 3-6

Requirement 1. What is the total cost of producing 1,400 mailboxes? The total cost of producing 1,400 maiboxes is Requirement 2. If $20;202 of the lotal costs are fixed, what is the variable cost of producing each mallbox? The vanable cost per unit is Requirement 3. Write Rollins Mailbox's cost equation. Requirments y= x+ 1. What is the total cost of produeing 1,400 mailboxes? 2. If $20,202 of the total costs are fixed, what is the variable cost of producing each mailbox? 3. Write Rolins Mailbox's cost equation 4. If the plant manager uses the average cost per unit to predict total costs, What would the forecast be for 1,600 mailboxes? 5. If the plant manager uses the cost equation to predict total costs, what would the forecast be for 1,600 malboxes? 6. What is the dollar difference between your answers to questions 4 and 5 ? Which approach to forecasting cosis is appropriate? Why