Write a word problem with Sylvester buying variety’s of donuts using this expression

3/4x - 12 - 3 + 4 = 10

Sylvester went to the donut shop and wanted to buy a variety of donuts. He bought 3/4 of a dozen donuts for $12, then he added 3 more donuts for $4. How much did Sylvester spend in total?