<em>From the question,</em>
<em>Rohan</em><em> bought an almirah for =Rs.13600= cost </em><em>price</em>
<em>Transportation cost =Rs.400</em>
<em>The total cost price of almirah =Rs.(13600+400)</em>
<em>The total cost price of almirah =Rs.(13600+400)=Rs.14000</em>
<em>He sold it for =Rs.16800= selling </em><em>price</em>
<em>By comparing SP and CP=SP>CP, so there is a </em><em>gain</em>
<em>Gain=SP−CP</em>
<em>=16800−14000</em>
<em>=Rs.2800</em>
<em>Gain %={(gain/CP)×100}</em>
<em>={(2800/14000)×100}</em>
<em>={2800/140}</em>
<em>=20%</em>