Trying to sort with getopts with different commands and cannot sort by price

I am trying to sort an inventory list in unix/linux below. I am successful in sorting by name and ID and able to pull up the usage menu but cannot sort by price, even with an "awk" function. I call the code with ./invOpt -p and the output continues to tell me it's an invalid option: -p then pulls up the usage menu below. I'm confused because it refuses to sort the 4th field where the price is. I don't know if the $ and/or the comma sign is messing up the sorting

"Usage: invOpts -i | -n | -p | -h
"  -i  sort by product ID"
"  -n  sort by product name"
"  -p  sort by price"
"  -h  display usage"

INVENTORY MENU:
Product ID   Product Name               	Quantity   Price       	Total Value
-----------  ------------------------------ --------   -----       	-----------
P101     	Apple MacBook Pro          	25     	$2,399.99   	$59,999.75
P102     	Samsung Galaxy S23         	40     	$799.99     	$31,999.60
P103     	Apple iPhone 15            	60     	$999.99     	$59,999.40
P104     	Google Pixel 8             	35     	$899.99     	$31,499.65
P105     	Microsoft Surface Pro 9    	18     	$1,299.99   	$23,399.82
P106     	Dell XPS 13                	50     	$1,099.99   	$54,999.50
P107     	Apple iPad Air             	75     	$599.99     	$44,999.25
P108     	Fitbit Charge 5            	100    	$179.95     	$17,995.00
P109     	Amazon Echo Dot 5th Gen    	150    	$49.99      	$7,498.50
P110     	Sonos One SL               	80     	$199.99     	$15,999.20
P111     	Logitech MX Master 3       	120    	$99.99      	$11,998.80
P112     	HP Spectre x360            	25     	$1,499.99   	$37,499.75
P113     	GoPro Hero 11              	60     	$399.99     	$23,999.40
P114     	Nintendo Switch OLED       	45     	$349.99     	$15,749.55
P115     	Canon EOS R6               	15     	$2,499.99   	$37,499.85
P116     	Seagate 2TB External Hard Drive 200    	$69.99      	$13,998.00
P117     	Apple AirPods Pro 2nd Gen  	130    	$249.99     	$32,498.70
P118     	MSI GeForce RTX 4070       	40     	$599.99     	$23,999.60
P119     	Lenovo ThinkPad X1 Carbon  	20     	$1,799.99   	$35,999.80
P120     	Anker PowerCore 26800      	180    	$59.99      	$10,798.20

CURRENT CODE:

#!/bin/bash

# Function to display usage information
usage() {
	echo "Usage: invOpts -i | -n | -p | -h"
	echo "  -i  sort by product ID"
	echo "  -n  sort by product name"
	echo "  -p  sort by price"
	echo "  -h  display usage"
}

# Process command-line options using getopts
while getopts ":inp:h" opt; do
	case $opt in
    	i)
        	# Sort by product ID (Field 1) and save to a temp file
        	tempFile="/tmp/inventory_sorted_by_id_$$.txt"
        	sort -t: -k1,1 ~/A09/inventory > "$tempFile"
        	;;
    	n)
        	# Sort by product name (Field 2) and save to a temp file
        	tempFile="/tmp/inventory_sorted_by_name_$$.txt"
        	sort -t: -k2,2 ~/A09/inventory > "$tempFile"
        	;;
    	p)
        	# Sort by price (Field 4) and save to a temp file
        	tempFile="/tmp/inventory_sorted_by_price_$$.txt"
        	sort -t: -k4,4n ~/A09/inventory > "$tempFile"
        	;;
    	h)
        	# Display usage and exit
        	usage
        	exit 0
        	;;
    	?)
        	# Handle invalid options
        	echo "Invalid option: -$OPTARG"
        	usage
        	exit 1
        	;;
	esac
done

# If no option is provided, default to original file
if [[ -z $tempFile ]]; then
	tempFile=~/A09/inventory
fi

# Source the myFunctions script to use the chkFile function
source ~/Homework9/myFunctions

# Store the inventory file name
filename=~/A09/inventory

# Check if the file exists using chkFile
chkFile $filename
if [[ $? -ne 0 ]]; then
	echo "Error: Inventory file does not exist."
	exit 1
fi

# Print the header
printf "%-12s %-30s %-10s %-15s %-15s\n" "Product ID" "Product Name" "Quantity" "Price" "Total Value"
printf "%-12s %-30s %-10s %-15s %-15s\n" "-----------" "------------------------------" "--------" "-----" "-----------"

# Initialize total inventory value
totalInventoryValue=0

# Read the sorted file line by line (either sorted or original)
while IFS=: read -r productID productName quantity price; do
	# Calculate the total value: Quantity * Price
	totalValue=$(echo "$quantity * $price" | bc -l)

	# Format the price and total value with commas
	formattedPrice=$(echo $price | sed ':a;s/\B[0-9]\{3\}\>/,&/;ta')
	formattedTotalValue=$(echo $totalValue | sed ':a;s/\B[0-9]\{3\}\>/,&/;ta')

	# Print the formatted data
	printf "%-12s %-30s %-10s $%-14s $%-14s\n" "$productID" "$productName" "$quantity" "$formattedPrice" "$formattedTotalValue"

	# Add total value to the overall inventory value
	totalInventoryValue=$(echo "$totalInventoryValue + $totalValue" | bc -l)
done /,&/;ta')

# Print the total inventory value
printf "\nTotal Inventory Value: $%-14s\n" "$formattedTotalInventoryValue"

# Clean up the temporary file
rm -f "$tempFile"