Compute variable cost element using high-low method

Question

Problem: Blake Corporation

Blake Corporation has the following data for use of its machinery

Month    Usage    Cost
Jun         600    $750
Jul          650    775
Aug        420    550
Sept       500    650
Oct         450    570

Q1. Using the high-low method, compute the variable cost element.

Q2. Using the high-low method, compute the fixed cost element (to the nearest whole dollar).