IPhone 5 data usage. How much data will I need for certain apps?

If I'm sending around 15-20 tweets a day, refreshing my twitter feed frequently about once every 10-15 mins & refreshing an Instagram feed around once an hour will 250MB's data be enough for a month?

I won't be posting any photo's on Instagram or Twitter when I'm away from Wi-Fi. I'll also be receiving about about 10 emails a day without attachments?

I have lots of Instagram followers and Facebook friends and I needa keep them updated last month I used over 500mb that's with YouTube videos too

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