please help!! im having a very difficult time

14. Lamonica, Inc.'s total Sales Revenue in the month of March was $254.000. Lamonica's costs are all mixed costs. The month of February's sales and production activity was low at 900 units and total mixed costs were $94,000. March was a month of high activity with total mixed costs $138,000 and sales & production units 2,000. Calculate Lamonica's estimated fixed cost using the high-low method (round to nearest S1). 15. Refer to the data in problem 14 above. Using only the data provided, calculate Lamonica's Net Income for the month of March (round to nearest S1). 16. Castro, Inc.'s sales revenue is $1,530,000 and its variable cost of goods sold is $948,600. Castro's total general, selling and admin expenses are 60% fixed and 40% variable. Its net income is $54,000. Calculate Castro's contribution margin (CM) ratio (round to nearest 0.00)