10,600*((1-(1+0.05)^-15) / (0.05))+81,850.39*(1+(0.05))^-15 - P=0
10,600*((1-(1+0.05)^-15) / (0.05))+81,850.39*(1+(0.05))^-15 = P
10,600 x ((0.51898290) / 0.05) + 81,850.39 x 0.4810171.. = P
10,600 x 10.379658 + 39,371.44 = P
110,024.37 + 39,371.44 = P
P = 149,395.81