Sub Haven, a small sandwich store, is located on a busy corner near many other businesses. The shop's busiest time is during the mid-day period. Rent for the location is $1000 per month, and wages amount to $2300 per month. Variable costs consist of supplies and sandwich ingredients that cost $2.34 per sub sandwich. The subs are to be sold at a price of $5.79 each. Answer each of the following independent questions. (a) How many sandwiches must the shop sell to break even? (b) If the shop increases variable costs by $0.17 per sandwich, how many sandwiches must it sell to break even? (c) If the rent increases by 7%, what would the profit be if the shop sold 1657 units? (d) If the sandwich price was reduced by $0.17, how many sandwiches must the shop sell to make $999 profit? (a) The shop must sell 957 sandwiches to break even. (Round up to the nearest whole number.) (b) If variable costs increase by $0.17 per sandwich, the number of sandwiches required to break even is (Round up to the nearest whole number.)