Answer :
$3.50 I believe because the cost of ONE cup of coffee and 3 donuts is $3.70. And 2 cups and 2 donuts are 10 cents more. So ONE cup and ONE donut are $3.50 I beleve
i think the answer is 3.5 because that since 1 cup of coffe and 3 donuts is 3.70
and it only added 10c so i think it is 3.5
and it only added 10c so i think it is 3.5