According to a survey of American households, the probability that the residents own two cars if annual household income is over $50,000 is 80%. Of the households surveyed, 60% had incomes over $50,000 and 70% had two cars. The probability that the residents of a household do not own two cars and have an income over $50,000 a year is?

can you please show me the math on this? this is all I can figure out from this problem. I'm not even sure which formula I'm supposed to be using

P(over 50K)= .60

P(2cars)= .70

P(2cars | over 50K)= .80