A regional electrical distributor currently has $1,000$ customers who buy an average of $$5,000$ per year, generating a $50\%$ margin. From experience, the company knows that $20\%$ of its customers will not return the next year and it takes an average of $$500$ to acquire each new customer. Given the choice of $1)$ investing $$50,000$ in a new customer acquisition program for $100$ additional customers or $2)$ investing $$50,000$ in a new retention program which would take the rate of retention from $80\%$ to $85\%,$ what should the company do$?$