Profit or Loss

Let the cost price and selling price of the Ferrari be $c_1$ and $s_1$ respectively.

Similarly, let the cost price and selling price of the Lamborghini be $c_2$ and $s_2$ respectively.

Selling price of both cars is same $\Rightarrow s_1 = s_2$ $\ldots \boxed{1}$

Profit on Ferrari is 20% $\Rightarrow s_1 = 1.2 * c_1$ $\ldots \boxed{2}$

Loss on Lamborghini is 20% $\Rightarrow s_2 = 0.8 * c_2$ $\ldots \boxed{3}$

Ferrari costs 200 $\Rightarrow c_1 = 200$

$\Rightarrow s_1 = 1.2 * 200 = 240$ $\ldots \boxed{From 2}$

$\Rightarrow 240 = s_2$ $\ldots \boxed{From 1}$

$\Rightarrow 240 = 0.8 * c_2$ $\ldots \boxed{From 3}$

$\Rightarrow c_2 = \frac {240}{0.8} = 300$

$\Rightarrow$ Lamborghini costs 300