Stephanie is 12 years old and often assists neighbors on weekends by babysitting their children. Calculate the 2018 standard deduction Stephanie will claim under the following independent circumstances (assume that Stephanies parents will claim her as a dependent).

a. Stephanie reported $1,025 of earnings from her babysitting.

b. Stephanie reported $1,815 of earnings from her babysitting.

c. Stephanie reported $17,690 of earnings from her babysitting.