Juke engineering produces batteries for a major car-maker . Juke'smonthly cost structured is shown in the table below . Assume that the firm's average variable costs of production remain constant at all levels of output shown .

Output level ( batteries) Total Costs $

1000 50000

2000 80000

3000 110000

1- Calculate the average variable costs of production for juke engineering.

2- Calculate the value of its monthly total fixed costs .

3- Calculate the change in average costs of production if juke engineering increases its production from 1000 batteries per month to 3000 batteries per month