Did anyone say 2?

$2 × 101 + 20×100 + 200 × 99 = 22002$

$2 × 101 + 20×100 + 200 × 99 + \ldots + 2 × 10^{99} × 2 + 2 × 10^{100} × 1 =$

$= 22002 + 1000n = 1000(n + 22) + 2 = \overline { \ldots 002} = \overline { \ldots ABC}$

Hence, A = 0, B = 0, C= 2 and

$A + B + C = 0 + 0 + 2 = \boxed {2}$

From first row we get A A =101 2=202 A equaLs 2 So 20 will go to another row B= 💯 2=200 b=0 And the 20 from first which is equal to 220 22 will go to third row Class=99*2=198 And the 22 from second row which gives 220 C=0 Now comes the toughest part Adding them 2plus 0plus0= 2

$\begin{aligned} S & \equiv (2+22+222+\cdots+\underbrace{222\cdots222}_{\text{\# of 2}= 101}) \text{ (mod 1000)} \\ & \equiv (2+22+(99)222) \text{ (mod 1000)} \\ & \equiv (2+22+2(100-1)(100+11)) \text{ (mod 1000)} \\ & \equiv (2+22+2(10000+1100-100-11)) \text{ (mod 1000)} \\ & \equiv (2+22+2(10000+1000-11)) \text{ (mod 1000)} \\ & \equiv (2+22+2(-11)) \text{ (mod 1000)} \\ & \equiv (2+22-22) \text{ (mod 1000)} \\ & = \boxed {2} \text{ (mod 1000)} \end{aligned}$