Tristan Inks Company has compiled the following data for the last five months of operations:

Month	Labor Hours	Cost of Sales
August	160	617
September	130	553
October	180	596
November	190	725
December	110	532

Applying the HIGH-LOW METHOD, derive the cost equation. _____________________.

Note: This is the only question that requires an answer that is not just numerical. For uniformity of answers do not include the currency sign. Do not place any spaces. Round-off FIXED COSTS to a whole number (no decimal places) and for VARIABLE COST per unit use 2 decimal places.