In: Finance
1.
=Loan*(rate/12)/(1-1/(1+rate/12)^(12*n))
=1500*(14%/12)/(1-1/(1+14%/12)^(12*1))
=134.68
2.
=(Loan+Loan*rate)/12
=(1500+1500*12%)/12
=140.00
3.
Add on applies interest to the entire beginning balance but normal
amortized loan applies interest to declining balance