Daily minimum spend on agency accounts starts at $1,000 / day. That means minimum $30,000 ad spend. Agency will bill you for the minimum ad spend's service fee which is $1,500.
If you wish to use the account but can't spend $1,000 daily, that's fine. Agency will bill you for the minimum ad spend service fee which is $50 daily so $1,500 total for the month. You can top up the account with as low as $2,000 as a start.
Daily minimum spend amount is counted as total daily spend across multiple ad accounts, in case you have multiple stores / links you'd like to advertise.