Howard plans to make regular savings contributions of $10,576 per semiannual period for 28 years with his first regular savings contribution one semiannual period from today. Suppose he also plans to make a one-time contribution of $18,449 in 11 years from today. How much would Howard expect to have in his account 28 years from today if he earns 7.22% on his savings?

The answer given is 1,903,201 I just am not able to get to that answer myself. Can someone help me?