Math Problem of the week

The answer to last week's problem of the week was 40

 The winners were Jaden Bartlett,  Bailey Bennett,  Isaac Bryson,  Camilla Bush,  Lyss Butler,  Nayeli Cerda,  Sara Chandler,  Anna Colton,  Aeris Eastland,  Kaleb Feland,  Grace Forbush,  Cole Gillespie,  Carter Hansen,  Emily Haroldsen,  Peter Heap,  Laney Hicks,  Callie Johnson,  Tracee Jones,  Isaiah Jones,  Madisyn Lott,  Allyson Marks,  Brother McKinley,  Jonah McNeil,  Corinne Orton,  John Perez,  Melissa Perez,  Olivia Perkins,  Molly Peterson,  Naomi Phillips,  Sarah Phipps,  Ty Reese,  Kaleb Robertson,  Justice Smith,  Spencer Stokes,  David Tonga,  Lauren Vehar,  Hailey Wilson   This week's problem of the week is: 

If four hamburgers and two hot dogs cost $16.40 and six hamburgers and four hot dogs cost $26.40, what is the combined cost of a hamburger and a hot dog?