Nothing to add except the budget increased.
We don’t know your ‘need’ component but you can try UNC, UVA,W&M as all have need aid (if you qualify).
Otherwise look at schools that hit but would you choose over UDel? All will have more math offerings than you’ll ever need. Most/all will have some sort of operations or supply chain.
Binghamton
UMASS
U of SC
UGA
UF
Alabama ($22k all in)
Michigan State - highly ranked in OPs Research/ Supply Chain
Ohio State
UTK - likely - strong in OPs
Can take full ride Hail Mary shots at Emory, Vandy, WUSTL…more for math.
Some schools assure need for intl students. Some need nlind, most need aware.
Are you full pay or have need ?
UMD would be great here but not budget friendly.