You should tell them your total comp including benefits. Don't overlook the value of benefits. At my last job for every hour I worked over my standard 40 hours

You should tell them your total comp including benefits. Don't overlook the value of benefits. At my last job for every hour I worked over my standard 40 hours I got an extra hour of annual leave. Standard hours in my field tends to be at least 45/wk so when I switched jobs I quoted a figure that included the value of this extra leave.