Sum up the largest

Given $s$ the sum of the digits, and $d$ the number of digits it is required to find the largest number that satisfies the condition.

The text contains lines of spaced integers $(d, s)$ . What is sum of the return values of each line?

Details and Assumptions :

• For $d=2$ and $s=9$ we get 90.

• For $d=3$ and $s=8$ we get 800.