Find the rate at which revenue is changing when the company is selling widgets at $200 each, homework help

Find the rate at which revenue is changing when the company is selling widgets at $200 each, homework help

A company selling widgets has found that the number of items sold, x, depends upon the price, p at which they’re sold, according the equation x =(30000/sqrt(3p+1))  
Due to inflation and increasing health benefit costs, the company has been increasing the price by $2 per month. Find the rate at which revenue is changing when the company is selling widgets at $200 each.