Normally, the buyer's offer in a commercial transaction takes the form of:. 1. a phone call with the parties directly speaking with each other.
2. a personal letter.
3. a purchase order.
4. an acknowledgment form.

3. a purchase order.

Explanation:

Normally, the buyer's offer in a commercial transaction takes the form of a purchase order. Commercial transaction refers to the law guiding, regulating or governing business transactions and deals.

A purchase order can be defined as an official document which a buyer send to sellers of goods and services in order to document and have a record of the sale of products and services to be delivered to the buyer at a later date. It allows making order without paying immediately.

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