Let the selling price = x
Therefore, we can use the following equation for interest to calculate this value.
Thus:
I = PRT = 768 where I = interest paid, R = rate of interest per year ( for one month, this is = 0.08/12), T = 1 and P = 0.80x (remember that the money loaned is 80% of the selling price x). 80% = 0.80 and 8% = 0.08
Substituting these figures into the equation yields:
0.80x(0.08/12)(1) = 768
0.064x/12 = 768
x = 768/[(0.064/12)] = 144,000
Therefore, the selling price is $144,000.