ปักหน่วยล่างสลากกินแบ่งรัฐบาล10งวด (สูตร2)งวด 16มิถุนายน2562
One of the dangers when becoming involved in property investments is making sure you can make a profit. After all, the whole point is to make money, so you don't want to blindly buy homes without crunching some numbers first. To calculate the return on your investment, you'll need the gross annual income of the property and the annual expenses the property will incur.
from: http://ezinearticles.com/?How-to-Evaluate-an-Investment?&id=7042043
