Packing List Template

I am tinkering with our current packing list template and I am wondering if there is a way to have Tie Downs come up in a summed up format the same way Electrical does. Right now, on our packing list we have "Power Required: *electric*", basically I would like an option that adds up all the tie downs necessary for listed rental units in the same way that I can put next to "Sandbags/Stakes Needed:" or something to that effect. I'm hoping there is already an option for this and I just cannot find it because it would really help out our guys while loading (we don't use delivery tab and therefore do not use vehicle packing lists).

Thanks!