A sales agent is paid commission on sales. If she sells $200$ products per month, she receives a commission of $10\%.$ If she sells more than $200$ products but less than $350,$ she receives a commission of $15\%.$ If she sells more than $350$ products per month, she receives a commission of $20\%.$ Using pseudocode, create an algorithm for the sales agent.

Develop a JavaScript program based on the algorithm you created in question