500 grams is 0.5 kilogram, so for the meat, Martha needs to pay 0.5 * 8 = $4.
For the cheese, Martha needs to pay 1.5 * 6 = $<<1.5*6=9>>9.
So in total for the ingredients, Martha needs to pay 4 + 9 = $<<4+9=13>>13.
#### 13