Compute The SCORE

i was assigned to make a computation for our individual scores using this:
EMPLOYEES A-N

inputs:
SURVEY(0-100)
LH(lost hour)
AHT(average handling time)

compute for:
SCORE
RANK

the SCORE has a total of 100%
so to get the SCORE, each input gets a percentage: SURVEY=40% LH=30% AHT=30% then added.

but the thing is LH and AHT has an equivalent.

LH
0 to 1=100
1.1 to 2=90
2.1 to 3=80
3.1 to 4=70
4.1 to 5=60
5.1 above=20......

eXAMPLE:
EMPLOYEE A
SURVEY(0-100) = 33.00
LH(lost hour) = 12.00
AHT(average handling time) = 14.20
SCORE = CODE
RANK = CODE

now for the rank i just use the code =RANK(SCORE A, SCORE A:SCORE N)

im lost on how to compute the SCORE though coz i can just use =((SURVEY*40%)+(LH*30%)+(AHT*30%))

but the one that needs to be on the LH and AHT are the equivalents and not the inputs.

and there is 1st 2nd and 3rd place. the name of the top 3 employees should be shown under the table.