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

$.$ORIG $3000$

LD R$2,$ ZERO

LD RO$,$ MO

LD RI$,$ M $1$

LOOP BRZ DONE

ADD R$2,$ R$2,$ RO

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

BR LOOP

DONE STR$2,$ RESULT

HALT

RESULT $.$FILL $0000$

ZERO $.$FILL $0000$

MO $.$FILL $0004$

M$1.$ FILL $0005$

$.$END