Larry's lemons is a street vendor business that sells lemonade and lemon bars. a cup of lemonade sells for $2 and a lemon bar sells for $1.50. when all related business expenses are included, a cup of lemonade costs $0.25 to prepare and a lemon bar costs $0.20 to prepare. last monday, one of the vendors selling larry's lemons sold at least $500 worth of lemonade and lemon bars and its expenses were no more than $100. at least 150 cups of lemonade were sold. let x be the number of cups of lemonade sold last monday and y be the number of lemon bars sold last monday. which ordered pair representing a combination of cups of lemonade and lemon bars could have been sold last monday and make sense in the context of the situation?