3 of 5 1. What is the total cost of producing 1,000 mailboxes? 3. Write Green Mailbox's cost equation. 4 lf te plant manager uses the average cost per uritto predict total costs, what would the forecast be for 1,900 maiboes? s. tie plant manager uses tie oost equation to prect total cots, what would the forecast be 1,900 mailboxes? The total cost of producing 1,000 malboxes is $ The variable cost per unt is $ ] 5 2 G H