Dimensional Analysis Question Please Help

We know
[tex]\boxed{\sf 1US\:ton=3.2\times 10^4ounce}[/tex]
[tex]\\ \sf\longmapsto 3.1\times 10^1ton[/tex]
[tex]\\ \sf\longmapsto 3.1\times 10^1\times 3.2\times 10^4[/tex]
[tex]\\ \sf\longmapsto 9.92\times 10^5ounce[/tex]