Hi, assuming I am in the business of designing and renovating music studios. I had faxed a company which sells the materials I need, regarding the price of e.g , 50 tiles and 1000L glue. Subsequently, the company faxed back stating in it the price per unit and the total cost of the purchase including service tax and shipping cost. It also included terms and conditions of which this condition , "7. (Availability and Delivery of Products)

7.1 Although every effort is made to deliver your order according to the estimated ship times provided, product availability and estimated ship times may change due to changes in supply."
had made me unclear as to whether its reply was an offer or invitation to treat.
I greatly appreciate any help by a person who is educated in the field of business law.

The reply seems to be an attempt to clarify the terms of sale (especially the lack of a guarantee of delivery date), in hope that you will accept and place the order.