Answer is given below :
Step-by-step explanation:
To persuade the supplier to stay in touch with the company and continue to supply it, we can do the following as 
- Tell the supplier that sales have increased with the new product that the company is going to market, using different estimation methods. 
- Demonstrate product samples to the supplier to gain their trust. 
- Provide the supplier with some favourable terms and conditions so that it stays with the company. 
- Make a formal agreement with him, we will order the bulk goods from the supplier