Is dropshipping halal when i am profiting in per product but companie will pay it in my account

If i create an account in a dropshipping website giving them a yearly amount of money and i will do marketing then when i have order i can shop as customer then I can select the profit amount like seller is selling 2 dollar and i will order for customer at 3 dollar and i will take 0.50 dollars advance from customer to confirm that he will take the product then the 0.50 dollars i have taken i will give it to the website while ordering then when customer receive product he will pay to the delivery man and when the delivery is done then the company will give me the extra 3-2=1 dollar in my account then i can cash out by payout option and they will pay this 2 times per month is it halal