reads a data file from the Big MACS
store manager of coursework 1, and
displays the contents of the file in a table,
highlighting the supplier field.
The user should be able to pick the filename via a form (or upload the file, using a file upload).
Extend the shopping cart example,
to additionally store for each article a unit price
and a currency; (Hint: Use a separate class to collect all information of an article)
Extend the show function to show prices and calculate the total cost of all articles
in the shopping cart.
Implement, in a separate class, a function that converts prices
between the currencies GBP, EUR and USD, and a apply the function to all elements
in the cart (Hint: Use array_walk to apply the function to all articles in the cart).