What is your effective rate of interest if you borrow $$7,200$ for $30$ days at a cost of $$50$ interest? How would the effective rate be impacted if the lean was for $$40$ interest? What if it was for $$55$ interest?

A corporation sells its product for $$52$ per unit and the variable cost to produce them is $$32.$ If fixed costs are $$70,000,$ what is the breakeven point in units? What happens to the breakeven point if the price increases to $$55?$ What if the price remained at $$52$ but fixed costs increased to $$80,000?$