Sam earns $500 per week plus $25 for every trinket he sells. Let $\displaystyle{M}\usepackage{cmbright}\Huge\$ represent the amount of money he made in a certain week and $\displaystyle{T}\usepackage{cmbright}\Huge\$ represent the number of trinkets that he sold that week.

i) Give an equation that describes the situation.

ii) How many trinkets must he sell to earn $1000 in a single week?