Update README.md

Author: tommygonzaleza

exercises/017-total_cost/README.md

@@ -2,7 +2,7 @@
 
 ## 📝 Instructions:
 
-1. A cupcake costs `D` dollars and `C` cents. Write a function that determines how many dollars and cents should one pay for `N` cupcakes. *The function gets three numbers: `D`, `C`, `N` and it should return two numbers: total cost in dollars and cents.*
+1. A cupcake costs `D` dollars and `C` cents. Write a function that determines how many dollars and cents should someone pay for `N` cupcakes. *The function gets three numbers: `D`, `C`, `N` and it should return two numbers: total cost in dollars and cents.*
 
 ## Example input:
 
@@ -18,4 +18,4 @@ total_cost(10,15,2)
 
 + If you don't know how to start solving this assignment, please, review a theory for this lesson: https://snakify.org/lessons/integer_float_numbers/
 
-+ You may also try step-by-step theory chunks: https://snakify.org/lessons/integer_float_numbers/steps/1/
++ You may also try step-by-step theory chunks: https://snakify.org/lessons/integer_float_numbers/steps/1/