Answer:
[tex]\boxed{ \$0.1032}[/tex]
Step-by-step explanation:
[tex] 100 g \: will \: be \: \to \: 0.1kg \\ hence : if \:1.25 kg \: costs \: \$ 1.29 \\0.1kg \: will \: cost \to \: \frac{ \$ 1.29 \times 0.1kg}{1.25kg} \\ 0.1kg \: will \: cost \to \: 0.08 ( \$ 1.29)\\ = \boxed{ \$0.1032}\\ [/tex]