The Robinson Company sells sports decals that can be personalized with a players name, a team name, and a jersey number for $6 each. Robinson buys the decals from a supplier for $1.80 each and spends an additional $0.60 in variable operating costs per decal. The results of last months operations are as follows:

Sales revenue $11,400 Cost of goods sold 3,420 Gross profit 7,980 Operating expenses 2,600 Operating income $5,380

Calculate contribution margin per unit? dollars? monthly breakeven point in units?dollars? and contribution margin ratio?