Mark runs a stall selling handmade cards and bookmarks. Each handmade card costs $20.00. Each bookmark costs $2.50. Mark wants his total sales to reach a minimum of $90.00 through the sale of at least one handmade card and several bookmarks. What inequality represents the various quantities of bookmarks (x) Mark must sell?
x≥70
x is greater than or equal to 70
x≥36
x is greater than or equal to 36
x≥16
x is greater than or equal to 16
x≥28