Processing:

Ask for the customer name and state. Compute the row index for the $2$D list.

If the state is invalid, end the program.

Use an efficient sentinel$-$controlled loop to read product identifications until the user wishes to quit.

If the product id is not found in the dictionary report an error.

Otherwise:

Report the style, color, size, unit price and stock in a neat chart

Ask the user for quantity

If the quantity is larger than stock report and error message

Otherwise:

Add quantity to total number of shirts purchased.

Compute and report cost as quantity times unit price.

Edit the record by subtracting quantity from stock and write back to dictionary

Compute shipping cost from state and total number of shirts purchased.

Report shipping cost.

Report grand total cost.

Sample #$1$: Invalid StateSample #$2$: Illustrating invalid product identificationEnter quantity: $1$cost: $$28\mathrm{.}00$Enter product id $($quit to end$)$: quitShipping cost: $$5\mathrm{.}00$Grand Total: $$33\mathrm{.}00$