What does this program do$?$ What is the RESULT value after running this code?

$.$ORIG $3000$

LD R$2,$ ZERO

LD RO$,$ MO

LD R$1,$ M$1$

LOOP BRz DONE

ADD R$2,$ R$2,$ R$0$

ADD RI$,$ R$1,-1$

BR LOOP

DONE ST R$2,$ RESULT

HALT

RESULT $.$FILL $0000$

ZERO $.$FILL $0000$

MO $.$FILL $0004$

M$1.$FILL $0005$

$.$END