USPS has flat rate priority mail boxes for $5.35 (small), $10.65 (medium) or $15.35 (large). that is to ship anywhere in the US, any weight. I also can ship regular first class mail and pay by weight. The option is up to you. This will probably be a lighter package. I could see if both items fit in the small flat rate box or otherwise it maybe cheaper to fit in any box and just pay by weight, rather than opt for medium box. The choice is yours!
USPS Flate rate boxes for priority mail runfrom $5.50 for a small box to $10.35 for medium and 15.35$ for a large box (any weight, one flat rate) to your zip. Tho I am thinking if I ship this one by weight, it may b cheaper. I can't see it being more than $6 if I ship by weight bc it's not very heavy, but choice is yours if u want priority or first class (regular mail).