A store owner bought $1500$ pencils at $$ 0.10$ each.  If he sells them for $$ 0.25$ each, how many of them must he sell to make a profit of exactly $$ 100.00$?
$\text{(A)}\ 400 \qquad \text{(B)}\ 667 \qquad \text{(C)}\ 1000 \qquad \text{(D)}\ 1500 \qquad \text{(E)}\ 1900$
$1500\times 0.1=150$, so the store owner is $$150$ below profit. Therefore he needs to sell $150+100= 250$ dollars worth of pencils. Selling them at $$0.25$ each gives $250/0.25= \boxed{\textbf{(C)}\ 1000}$.