What is the answer to this question: Janet's 4th grade class has a spelling list organized by subject. The spelling list includes 170 words about history, 75 words about science, 60 words about math,...

Janet's 4th grade class has a spelling list organized by subject. The spelling list includes 170 words about history, 75 words about science, 60 words about math, and 55 words about geography. Each week, Janet's teacher tests her on 15 words from the list. Janet's class has already had 7 weeks of spelling tests. How many more words will Janet be tested on before the end of the year?