You decide today to contribute 5% of your monthly salary for your retirement. Your employer pays 100% of your contribution up to 5% of your monthly salary. Both contributions will be invested in your employer's 401K account. Your monthly salary will remain fixed at $ 2,800.

What is the amount that will be contributed monthly to your 401K? (show your calculations)

a. $ 140

b. $ 280

c. $ 125

d. $ 250