12 square feet of paper at $1 per square feet
4 feet of wood at $3 per foot
14 yards of string at $2 per yard
calculate how much money maria spent on her supplies

Given data:
12 square feet of paper at 1 dollars per square feet
=> 12 square feet * 1 dollar = 12 dollars
4 feet of wood at 3 dollars per foot
=> 4 feet of wood * 3 dollars = 12 dollars
14 yards of string for 2 dollars per yard
=> 14 yards of string * 2 dollars = 28 dollars
Now let’s solve that total:
=> 12 dollars + 12 dollars + 28 dollars
=> 52 dollars.
Thus, Maria spent a total of 52 dollars in buying her need supplies.