Guido is a citizen and resident of Belgium. He has a full-time job in Belgium and has lived there with his family for the past 10 years. In 2016, Guido came to the United States for the first time. The sole purpose of his trip was business. He intended to stay in the United States for only 180 days, but he ended up staying for 200 days because of unforeseen problems with his business. Guido came to the United States again on business in 2017 and stayed for 170 days. In 2018 he came back to the United States on business and stayed for 70 days. Under the substantial presence test defining a resident alien, how many days was Guido present in the U.S. in 2011?

Under the substantial presence test defining a resident alien, how many days was Guido present in the U.S. in 2018?