Marla works for an ice cream cart vendor. She receives $28 for taking the cart out for a shift plus a commission of $0.15 for each item she sells. Marla worked a shift on Sunday and earned $55.30. Which equation can be used to solve for x, the number of items Marla sold?

55.30 = 0.15x + 28
55.90 = 28x + 0.15
55.90 = 0.15 + x + 28
55.90x = 0.15x + 28
pl lmk asappp