Anyone Knowledgeable in Assembly Language? My Ass is Thoroughly Kicked.

[TimeBomb]

I was tasked with making a program wherein you input 4 digits and it'd add them up. Then he wanted us to use a shift command to calculate the average... In class the command worked, at home? Not so much.

I'm using MASM as a compiler, When I start the MASM command I get to issues by the time it's done

takehome.as(65): warning 14031: Operand types must match
takehome.as(73): warning 14031: Operand types must match

I assumed this meant that the commands on lines 65 + 73 had to be equal, so I did just that to no avail.

When I go to do the link .obj command It goes

Run File [~~~.exe] :
List File [NULL.MAP]:
Libraries [.LIB]: 

I input Util.lib because that's what he told us to do. but it comes up as

LINK : warning L4051: UTIL.LIB : cannot find library
Enter new file spec: 

This I haven't gotten any clue as to what's the issue at hand. Upon hitting enter it pops up as

PUTDEC in file(s): 
 TAKEHOME.OBJ(takehome.asm)
GETDEC in file(s):

These were 2 errors detected

When I the program, it sort of just shits the bed. At any rate, if anyone here is a cryptologist and can help me the full code is

.MODEL SMALL
;.586


EXTRN   GetDec:NEAR
EXTRN   PutDec:NEAR


.STACK 100h


.DATA
P    DW    ?
Q    DW    ?    
R    DW    ?
S    DW    ?
RESULT    DW    ?


Prompt1 DB 'Number one is?        ','$'
Prompt2 DB 'Number two is?        ','$'
Prompt3 DB 'Number three is?        ','$'
Prompt4 DB 'Number four is?        ','$'
Answer1 DB 'The total is:               ','$'
Answer2 DB 'The average is:             ','$'
Newline DB 10,13,'$'




.CODE
CALC    PROC


    mov ax, @DATA
    mov ds, ax    ;    "Standard Boilerplate"


;Input Segment


    mov dx, OFFSET Prompt1
    mov ah, 9h
    int 21h ;    DOS Display Prompt1
    call GetDec
    mov P,AX;    Moves AX into P


    mov dx, OFFSET Prompt2
    mov ah, 9h
    int 21h ;    DOS Display Prompt2
    call GetDec
    mov Q,AX;    Moves AX into Q


    mov dx, OFFSET Prompt3
    mov ah, 9h
    int 21h ;    DOS Display Prompt3
    call GetDec
    mov R,AX;    Moves AX into R


    mov dx, OFFSET Prompt4
    mov ah, 9h
    int 21h ;    DOS Display Prompt4
    call GetDec
    mov S,AX;    Moves AX into S


;Process: computing the sum


    mov    AX, P
    add AX, Q
    mov DX, AX
    add DX, R
    mov AX, DX
    add AX, S          ; 
    mov Answer1, AX       ; Adds it all up


    
;Output
    mov dx, OFFSET Answer1
    mov ah, 9h
    int 21h


    mov Ax, Answer1
    call PutDec


    mov dx, OFFSET Newline
    mov ah, 9h
    int 21h






    mov al, 0
    mov ah, 4ch
    int 21h


CALC    ENDP


END