A charity organization sells two types of raffle tickets: standard tickets and premium tickets. Standard tickets cost $10$ dollars each, and premium tickets cost $25$ dollars each. For a recent event, the organization sold $s$ standard tickets and $p$ premium tickets, generating a total revenue of $R$ dollars. The relationship between the number of tickets sold and the total revenue is modeled by the equation $10s+25p=R$. Which of the following is the best interpretation of the number $25$ in this context?