php?

Hey could anyone help me with this? its for a project and i need help giving the values a number and adding those values together. Don’t know how to do this with checkboxes

Services
Pool Access
Breakfast
Lunch
Dinner

$fname = ($_POST['fname']);//setting the variables
$sname = ($_POST['sname']);
$Ph    = ($_POST['Ph']);
$email = ($_POST['email']);
$room  = ($_POST['room']);
$services = ($_POST['services']);
$roomcost = 0;
$servcost = 0;
$total = $roomcost + $servcost;

So give the values numbers, not understanding the issue.

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