Replace conditional statements with user defined function

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Python

I'm trying to replace the highlighted block of conditional statements with user defined functions. I tried various methods but they were messing up the loop. I'll be glad if anyone helps me with this problem. Thank you.

What I have tried:

progress_count = 0
trailer_count = 0
exclude_count = 0
retriever_count = 0

while True:
    while True:
        try:
            #get inputs from user
            pass_credits = int(input("\nPlease enter your credits at pass: "))               
            defer_credits = int(input("Please enter your credits at defer: "))     
            fail_credits = int(input("Please enter your credits at fail: "))
        except ValueError:
            print("Integer Required \n")
            continue
        if pass_credits + defer_credits + fail_credits != 120:
            print("Total incorrect \n") #sum of inputs entered should be 120
            continue
        elif (pass_credits or defer_credits or fail_credits) not in range (0,121,20):
            print("Out of range")  #range of entered inputs should be 0,20,40,60...120
            continue
        else:
            #type, total and range of inputs entered are correct
            break 

    #conditions to assess student progess                                       
    if pass_credits==120:                                                   
        print("Progress\n")
        progress_count+=1
    elif pass_credits==100:                                            
        print("Progress (module trailer)\n")
        trailer_count+=1
    elif fail_credits>=80:                                                  
        print("Exclude\n")
        exclude_count+=1
    else:
        print("Do not progress - module retriever\n")
        retriever_count+=1

    #prompting for confirmation to enter more students' data on their progression or quit and view as horizontal histogram
    rerun_program = str(input("Would you like to enter another set of data? \nEnter 'y' for yes or 'q' to quit and view results: "))
    if rerun_program == 'y':
        #loops back to try block to get new data
        continue
    elif rerun_program == 'q':
        print("\nHorizontal Histogram")
        print(f"Progress {progress_count} : {progress_count*'*'}")
        print(f"Trailer {trailer_count} : {trailer_count*'*'}")
        print(f"Retriever {retriever_count} : {retriever_count*'*'}")
        print(f"Exclude {exclude_count} : {exclude_count*'*'}")
        print(f"{progress_count + trailer_count + retriever_count + exclude_count} outcomes in total.")
        #displays the entered data as a horizontal histogram and kills program
        break