business math...ahaks (trading)

• net payment = L(1-d)
• trade discount amount(TDA)= list price - net price
• cash discount = %/100 x list price
• equivalent rate, r = 1 - (1-d1)(1-d2)(1-d3).......NP=L(1-d)

nanti kalo ingat lg,aku smbung...hahahhaha... :P