curious if im right im mot sure

The manufacturing costs of Mocha Industries for three months of the year are as follows: Total Cost Production April $51,284 1,440 Units 53,372 2,020 June 56,612 2,920 a. Using the high-low method, determine the variable cost per unit. Round your answer to two decimal places. 3.60 per unit May $ b. Using the high-low method, determine the total fixed costs. $ 461