$1.$ Write a program that tallies the items one places inside their shopping cart. It should have the functions below:

a$.$ def main$\_$menu$()$: This function should display the main menu and return the response selected by the user to the main function. It should contain logic to account for invalid response input.

Please note: Use the function name provided. The function should have no parameters and must return a string value.

b$.$ def cart$\_$menu$()$: This function should display the shopping cart items and return the response selected by the user to the main function. It should contain logic to account for invalid response input.

Please note: Use the function name provided. The function should have no parameters and must return a numeric value.

c$.$ def main$()$: This function is responsible for keeping track of the item count and the total cost of all the items added to the cart and displaying the final output.

Please note: Use the function name provided. The function should have no parameters and must return no value.

d$.$ You are free to use more functions than those listed. Use the sample output to guide you on the program logic.

Please note:

$$ Strip your string input and make sure you are accounting for upper$-$ and lower$-$case input.

$$ Don$$t use global variables.

$$ Currency values should be displayed to $2$ decimal places.

$$ Your program should work as shown in the sample output scenarios below $($i$.$e$.,$ don$$t change the menu items or how the prompts are displayed$)\mathrm{.}1.$ Write a program that tallies the items one places inside their shopping cart. It should have the functions below:

a$.$ def main$\_$menu$()$: This function should display the main menu and return the response selected by the user to the main function. It should contain logic to account for invalid response input.

Please note: Use the function name provided. The function should have no parameters and must return a string value.

b$.$ def cart$\_$menu$()$: This function should display the shopping cart items and return the response selected by the user to the main function. It should contain logic to account for invalid response input.

Please note: Use the function name provided. The function should have no parameters and must return a numeric value.

c$.$ def main$()$: This function is responsible for keeping track of the item count and the total cost of all the items added to the cart and displaying the final output.

Please note: Use the function name provided. The function should have no parameters and must return no value.

d$.$ You are free to use more functions than those listed. Use the sample output to guide you on the program logic.

Please note:

$$ Strip your string input and make sure you are accounting for upper$-$ and lower$-$case input.

$$ Don$$t use global variables.

$$ Currency values should be displayed to $2$ decimal places.

$$ Your program should work as shown in the sample output scenarios below $($i$.$e$.,$ don$$t change the menu items or how the prompts are displayed$).$