A consumer's income is $40 per week. The consumer spends this money on two goods: online music and online games. The price of each online song is $10 and the price of each online game is $20. What is the maximum amount of online games per week that this consumer can buy, if the consumer buys 2 songs per week? Enter your response as an integer: do NOT use decimals (for example, if you calculate 3.65, round your answer to 4)