[Gaining Ratio and Sacrificing Ratio]
[Proportion]
[Percentage]
[Discount]
[Commission and Brokerage]
[Simultaneous Equations]
[Prepration of Invoice]
[Elementary Matrices]
[Logarithms and Antilogarithms]
[Introduction of Calculus, Methods of Differentiation and Partial Derivative]
[Simple Interest]
[Compound Interest]
[Profit and Loss]
[LINEAR PROGRAMMING : INTRODUCTION]