The cost of a gym membership if there is a $50 enrollment fee and the charge is $35 a month.

The cost of a gym membership with a $50 enrollment fee and a monthly charge of $35 would be calculated as follows:

First, add the one-time enrollment fee of $50 to the total cost.
Total cost = $50

Next, calculate the monthly charges by multiplying the monthly fee of $35 by the number of months in the membership. Assume the membership is for one year (12 months).
Monthly charges = $35 * 12 = $<<35*12=420>>420

Finally, add the total cost of the enrollment fee and the monthly charges to find the overall cost.
Overall cost = Enrollment fee + Monthly charges
Overall cost = $50 + $420 = $<<50+420=470>>470

So, the cost of the gym membership with a $50 enrollment fee and a $35 monthly charge for one year is $470.