Nancy needs at least 1000 gigabytes of storage to take pictures and videos on her upcoming vacation. She checks and finds that she has 105G B available on her phone. She plans on buying additional memory cards to get the rest of the storage she needs. The cheapest memory cards she can find each hold 256 G B and cost $10. She wants to spend as little money as possible and still get the storage she needs.
Let C represent the number of memory cards that Nancy buys.