A program is required to calculate the total shipping cost for commercial cargo. Shipments are processed either as standard parcels or as bulk liquid cargo.

The user enters the number 50 if the shipment is for standard parcels, or the number 60 if the shipment is for bulk liquid cargo. The user then enters either the number of parcels (an integer) or the liquid cargo volume in cubic meters (a real number).

The program checks for invalid input. If the input is valid, the program calculates and displays the total shipping cost.

Currency formatting with two decimal places and a currency symbol is not required.

Table 1: Test cases and expected outputs

Open file Q03.py which contains the following skeletal code:

# TODO: create an integer variable named cargoType and set it to 0

PARCEL_RATE = 15.40
LIQUID_RATE = 112.50

cargoType = int(input("Enter cargo type (50 or 60): "))

if cargoType != 50 [operator] cargoType != [constant]:
    print("Invalid cargo type")
else:
    if cargoType == 50:
        count = int(input("Enter number of parcels: "))
        if [check for 0 or negative count]:
            print("Invalid number of parcels")
        else:
            total = count * PARCEL_RATE
            print("Total cost is " + str(total))
    elif cargoType == [constant]:
        volume = [accept a real value for volume]
        if volume [relational operator] 0:
            print("Invalid volume")
        else:
            total = [calculate total cost based on liquid volume]
            # TODO: add a line to display an informative message and the total cost