Tia's aunt gave her some money to buy whatever she wanted over the Spring Break. She got an additional $30 from her grandmother. Tia spent half of her money on a pair of the Jordan 5 "Raging Bulls". How much money does Tia have left ?

Idon't want to fail summer school.the probabilities of contamination in medicine capsules due to the presence of heavy metals and different types of microbes are given in the table.the probability of capsule b having microbial contamination is (the same as, greater than, less than) the probability of capsule d having it.