Answer :
Roy earns 34% on sales of pizza and 12% on sales on coke .
And ,
This week he earned Rs 55.88. His sales of pizza were Rs 2 more than his sales of coke.
Let sale of pizza = x
So sale of coke = x - 2
And from given information , we get
34% of x + 12% of ( x -2 ) = 55.88
46x - 24 = 5588
46x = 5612
x = 122
So,
He earn by selling Pizza = = Rs. 41.48 ( Ans )