Hourly Rate

[Kabella22]

Hi everyone. I recently put an ad on Craigslist (I'm a nanny) for in their home childcare. I specifically put my rates started at $10 per hour. I had a lady email me for two children, a one year old and a 3 year old but, she said she also has two other kids who ill be watching for four ours in the afternoon but because they are 5 and 7 they won't need care so she just wants a weekly rate for the two little ones. Now I've worked with afterschool before and from what I've noticed, when they are with you, they also need attention. They want snacks, need homework help, want you to play with them. They need to be entertained but, with it being in her house I don't how to what level of entertainment they are going to need. I feel like shes asking me for my weekly rate and telling me her two older children don't need care is because she thinks it will be cheaper. So I guess my question is, when I email her to tell her my rate should I explain to her why it is what it is? Or do I just give it to her?