Mirtha owns an online jewelry store that specializes in earrings. In March, she sells $50$ pairs of earrings priced at $$15.$ The cost of materials to create the $50$ pairs of earrings was $$100.$ The website she uses to sell her wares costs her $$10$ a month, and she is also charged $4\%$ on each sale by the company that processes debit$/$credit card purchases.

Which of the following best represents Mirth$$s total cost?

The sum of the materials $($$$100),$ website charge $($$$10),$ and $4\%$ payment processing charge $(4\%)$

The cost of all the materials used to create the earrings, $$100$

The costs of materials minus the costs it takes to run her business through the online store, in this case the $$10$ website charges and the $4\%$ payment processing charge

The $$750$ Mirtha earned from earring sales minus the materials $($$$100),$ online website charge $($$$10),$ and payment processing charge $(4\%)$