Shay buys and sells seashells at the seashore. shay buys purple seashells for $3 each, brown seashells for $2 each and shimmering seashells for $6 each. she sells the purple seashells for $4.50 each, the brown seashells for 3.75 each, and the shimmering seashells for $7 each. use the distributive property to write a numerical expression to represent shay's total profit