Copy can be expensive.Logical formLearned from7 sentences. A (health-care system) can be expensive.Logical formLearned from7 sentences. A requirement can be expensive.Logical formLearned from7 sentences. Illness can be expensive.Logical formLearned from7 sentences. 2xes can be expensive.Logical formLearned from7 sentences. Modifications can be expensive.Logical formLearned from7 sentences. A bike can be expensive.Logical formLearned from7 sentences. Some cities can be expensive.Logical formLearned from7 sentences. (Doctor visits) can be expensive.Logical formLearned from7 sentences. Films can be expensive.Logical formLearned from7 sentences. Cement can be expensive.Logical formLearned from7 sentences. Petrol can be expensive.Logical formLearned from7 sentences. Propane can be expensive.Logical formLearned from7 sentences. Some homes can be expensive.Logical formLearned from7 sentences. Stuff may get expensive.Logical formLearned from7 sentences.