Violet buys a $$140,000$ jar company in $2005($January $2^{nd})$ by financing the entire purchase with a loan that she pays $6\mathrm{.}4\frac{\%}{?}$ year compounded monthly for $20$ years. If she sells the company in $2019($January $2^{nd})$ for $$300,000,$ then what would be her equity? How much total interest would Violet pay for the loan?

What should be the size of Chinchilla's biweekly deposits in order to accumulate $$74,000$ in an account that pays $4\mathrm{.}87\frac{\%}{?}$ year interest for $13$ years? How much interest will she earn? $($Consider a $50-$week year$)$