Identify the shortcomings in Maria's telephone skills based on the provided scenario.

Here are the shortcomings of Maria's telephone skills:

• Dialing the wrong number: Maria initially dials the wrong number, reaching "Mbitini bookshop" instead of "Wananachi Wholesalers."
• Lack of preparation/organization: She doesn't have a clear list of items she wants to order, needing to ask her husband during the call.
• Lack of specific details: She doesn't know the preferred brand of wheat flour, the quantity of tea leaves, or the quantity of soap when asked.
• Shouting: She shouts the delivery number "2-3" instead of speaking clearly, indicating poor phone etiquette.